PiFl Labs Archive 2026 —

The apps. The changes. The journey.

Public versions and surviving official materials. A partial, manually verified collection; unknown versions and release dates stay unknown.

Manually verified · as of 2026-11-02 15 App 41 records

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Choose several apps together. No selection shows all apps.

All apps

Release, submission and approval are separate events. Explicit timestamps use UTC; the checked date records when evidence was reviewed.

How did the features evolve?

Select apps to compare their journeys. Version notes and verified releases are distinct. Year, platform and type filters apply to the event records below.

Korean Bridge: Hangul for Kids3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.0(20)

    The baseline is an offline curriculum with 300 targets across 60 themed packs.

  2. Major change

    1.0.0 → 1.0.1 notes

    Review revisits finished packs and difficult words, with better Hangul sequencing and spoken feedback.

  3. Recent change

    1.0.1(22) notes → 1.0.2 public observation

    Notes describe illustrated scenes for eight games; public version 1.0.2 was observed separately.

The precise delta from documented 1.0.1 to public 1.0.2 is unverified; internal build 21 is not counted as a release.

Sources and limits
  • docs/release/1.0.0.md · Git 0a17ed5f
  • docs/release/1.0.1.md · Git c7a07d58
Pomodoro at Sea: Focus Timer3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.2 → 1.0.3

    Voyage-based focus and treasure rewards gained an ad-free introduction.

  2. Major change

    1.0.16 → 1.1.0

    Cabin Radio added independent music and ambience mixing, adjustable during a session.

  3. Recent change

    1.1.0 → 1.2.0

    Collection expanded into sailor progression, outfits and island conquest; existing outfits carry over.

Individual fixes in 1.0.4–1.0.15 are not exhaustively reconstructed. Later changes up to public 1.2.3 are kept in the dated records only.

Sources and limits
  • docs/release/1.0.3.md · Git eb56483a
  • docs/release/1.1.0+45.md · Git a5385257
  • docs/release/1.2.0+51.md · Git a64897b4
Photo Outlines: Coloring Book3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.0 intro notes

    The initial notes describe turning photos into outlines and coloring with brushes.

  2. Major change

    1.0.0 → 1.0.11

    Color-style conversion and stickers expanded the outline-and-color workflow.

  3. Recent change

    1.1.2 public record

    Printing and PDF export took colored work beyond the screen, with improved color selection.

1.0.1(19) was held from public release. Feature changes in version 1.2.2 need separate verification. Public 1.2.3 changes are kept in the dated records only.

Sources and limits
  • docs/release/1.0.0+5.md · Git 922acf93
  • docs/release/1.0.1+19.md · Git 853d8794
  • docs/release/1.0.11+37.md · Git 0de3d4de
Hangul Voyage: Korean Puzzle3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.0 → 1.0.1

    Letter-linking voyages expanded into five themed packs including food and travel.

  2. Major change

    1.0.8 → 1.0.9

    Word search was followed by initial-consonant quizzes, adding ways to play beyond linking letters.

  3. Recent change

    1.0.10 candidate → 1.1.0 public observation

    The public listing includes a proverb mode that fills gaps with the same letter wheel as the main game.

Proverb documentation retains the 1.0.10 candidate label; its first public arrival is not asserted as 1.0.10. Changes from 1.2.0 to public 1.3.1 are kept in the dated records only.

Sources and limits
  • docs/release/1.0.0.md · Git b9b5ee1e
  • docs/release/1.0.1.md · Git 940148b2
  • docs/release/1.0.9+27.md · Git e68fcb7a
  • docs/release/1.0.10+28.md · Git 0b4f2764
  • ios/fastlane/metadata/ko/release_notes.txt · Git 0b4f2764
KanaSprout: Japanese for Kids3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.0 intro notes

    Early learning combined listening to characters, tracing strokes and playful first words.

  2. Major change

    1.0.0 → 1.0.1

    An English-to-Korean course and word illustrations expanded lessons and island progression.

  3. Recent change

    1.0.9 → 1.0.10

    Audio no longer overlaps; playback, sticker rules and resuming a session became clearer.

Historical subscription terms are not presented as current terms; intermediate release dates need verification. Public 1.1.0 changes are kept in the dated records only.

Sources and limits
  • docs/release/1.0.0.md · Git 3842bf9e
  • docs/release/1.0.1.md · Git e6c5b6eb
  • docs/release/1.0.10+33.md · Git da92960f
Vocab Routine: JLPT & TOPIK3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.0 → 1.0.1

    Flashcards and quizzes gained an optional rewarded-ad extension to free study limits.

  2. Major change

    1.0.5 → 1.0.6

    Maintenance focused on mastery indicators, large text and notification guidance.

  3. Recent change

    1.0.11 → 1.0.12

    Handwriting recall added a write-and-compare review flow, without automatic grading or changing study history.

Features after 1.0.12 are outside this summary. Earlier stages are supported by version notes, not verified individual release dates.

Sources and limits
  • docs/release/1.0.1.md · Git 46548346
  • docs/release/1.0.6.md · Git c92bb1f3
  • docs/release/1.0.12+30.md · Git 0cc3950c
Until That Day: Countdown3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.0 → 1.0.1

    Countdowns, widgets and reminders gained sorting by proximity, creation order or name.

  2. Major change

    1.0.5 → 1.1.0

    Widgets gained translucent backgrounds and a direct action to create a countdown.

  3. Recent change

    1.1.4–1.1.5

    Pinned countdowns, reminder rescheduling and long-title/large-text readability were refined together.

The notes record Play 1.1.4 being replaced by 1.1.5, so their changes are grouped. Changes from 2.0 on are kept in the dated 2.0.1 record, not in this summary.

Sources and limits
  • docs/release/1.0.1+11.md · Git 5ee7fece
  • docs/release/1.1.0+20.md · Git a3248f5d
  • docs/release/1.1.5+28.md · Git a7e57e3e
Mood Tile: Daily Journal3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.0 intro notes

    The original diary recorded moods as weather with photos, tags and monthly maps.

  2. Major change

    1.0.0 → 1.0.1

    Annual maps and mood-by-tag statistics expanded reflection beyond daily and monthly entries.

  3. Recent change

    1.0.11 → 1.0.12

    Ads and tracking were removed and locking became free, alongside file backup, draft recovery and favorites.

Later sharing features in development metadata are not attributed to 1.0.12. Public 1.0.13 changes are kept in the dated records only.

Sources and limits
  • docs/release/1.0.0.md · Git f7bbb86e
  • docs/release/1.0.1.md · Git ba2bb2d6
  • docs/release/1.0.12.md · Git b8a2d758
  • android/fastlane/metadata/android/ko-KR/changelogs/25.txt · Git 4f410231
Dialogos: Stoic Dialogues3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    Android 1.0.0

    The Android baseline centered on conversations with sages; the iOS launch baseline differs.

  2. Major change

    1.0.0 → 1.0.2

    Verified passages grew from 34 to 103, with fuller replies, suggested practices and responsive expressions.

  3. Recent change

    1.0.2 → 1.0.3

    Support-line country selection was added, and replies now appear together after safety checks.

1.0.1 was skipped and included in 1.0.2, documented as the first iOS release.

Sources and limits
  • docs/release/1.0.1.md · Git 2b355bbc
  • docs/release/1.0.2.md · Git df6198ab
  • docs/release/1.0.3.md · Git 700628e5
Tidewalk: Korea Tide Timer3 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    1.0.5(7) notes

    The current company-account baseline documents tides, weather and widgets by station.

  2. Major change

    1.1.0(12) notes

    The timetable expanded into current tide state, curves, activity indices, calendars and alerts.

  3. Recent change

    1.1.2(14) notes

    Notes add English, species forecasts and island-name search while preserving the view when location fails.

Each documented version rollout is unverified, and the earlier personal-account lineage is kept separate. Android 1.2.0, renamed Tidewalk, is kept in the dated records only; on 2026-11-02 it was not in the public App Store listings.

Sources and limits
  • docs/release/1.0.5+7.md · Git 8b204fae
  • android/fastlane/metadata/android/ko-KR/changelogs/12.txt · Git ab793b8e
  • android/fastlane/metadata/android/ko-KR/changelogs/14.txt · Git 71fa917d
Cell by Cell Sudoku2 · Starting point → Major change → Recent change

Version-document comparison, not release dates

  1. Starting point

    Android 1.0.0(1)

    The public Android baseline offers 300 puzzles, stepwise explanatory hints, notes and paper-puzzle entry.

  2. Recent change

    1.0.1(12) submission notes

    A submission document describes an implementation transition while retaining features, puzzles, notes and records.

iOS first appeared on 2026-10-28 (App Store lookup). The first public iOS version is not recorded; the 1.0.2 courses, daily puzzle and rankings are kept in the dated record.

Sources and limits
  • android/fastlane/metadata/android/ko-KR/changelogs/1.txt · Git 27abca8f
  • docs/release/1.0.1.md · Git 93528886
Kkachi: Your Folk PaintingPublic feature history unverified

The Android 1.1.0 release was observed, but no versioned feature notes were found, so changes before and after release are not summarized.

Sources and limits
  • pubspec.yaml · Git 781a4d28
Spending Log: Expense TrackerPublic feature history unverified

Google Play public listing checked on November 5, 2026. Android only; version history, first release date and an iOS release are unverified.

Sources and limits
  • docs/release/spend-android-public-20261105.json
Skydaze: Cloud & Star GazingPublic feature history unverified

Initial sky-viewing release copy exists, but public initial/intermediate feature changes remain unverified.

Sources and limits
  • store/ko-KR/release_notes.txt · Git 8dca9172
PiPi Legion ChroniclePublic feature history unverified

Control and fleet redesign notes exist for internal candidates 0.4.0 and 0.6.0, but are not tied to public releases and are excluded from the release journey.

Sources and limits
  • docs/release-candidate-v0.6-2026-08-14.md
  • docs/core-loop-release-verification-2026-08-14.md

2026

  1. Release observed

    Google Play release observed

    Google Play production showed 1.1.0 publicly, listed as Kkachi: Your Folk Painting. The first public date is unverified; it was not in the public App Store listings that day.

    Evidence and dates
    Evidence and dates
    Public store availability checked
    Checked
  2. Release observed

    1.2.0 as Tidewalk

    Google Play production showed 1.2.0. The listing is now named Tidewalk and centers on a head-back countdown. The exact rename date is unverified; it was not in the public App Store listings that day.

    Evidence and dates
    Evidence and dates
    Public store availability checked
    Checked
  3. Release observed

    Android 1.1.0 observed

    Google Play production showed 1.1.0, whose listing adds seven EPS-TOPIK decks and nine display languages. The public iOS version that day was 1.0.14.

    Evidence and dates
    Evidence and dates
    Public store availability checked
    Checked
  4. Public update

    Theme Voyage packs and larger text

    Public-store record for 1.3.1: Theme Voyage packs start from the easiest, Food, and board letters fit their squares at larger text sizes. Public timing of 1.2.0 and 1.3.0 is not recorded here.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-11-01T20:54:23Z
    Platform
    KR · JP · US
  5. Public update

    Four courses and 600 puzzles

    Public-store record for 1.0.2. The App Store lookup gives 2026-10-28 as the first iOS release. Notes list four courses, 600 puzzles, a daily puzzle and optional rankings.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-31T16:42:26Z
    Platform
    KR · JP · US
  6. Public update

    Bigger tools for drawing together

    Public-store record for 1.2.3. Its notes describe a larger tools-and-colors mode, two-finger zoom and pan, and choosing the area to draw first. Listing images still include earlier screens.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-30T19:56:44Z
    Platform
    KR · JP · US
  7. Public update

    Eight situation lessons

    The US 1.1.0 notes list eight situation lessons, five of them new, each with a scene picture. The language learned and the content depend on the device language.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-25T19:54:01Z
    Platform
    KR · JP · US
  8. Public update

    Treasure for longer focus

    Public-store record for 1.2.3. Its release notes say every 25 minutes earns one treasure and leftover time carries into the next voyage.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-24T15:17:49Z
    Platform
    KR · JP · US
  9. Public update

    Until That Day 2.0

    Public-store record for 2.0.1. The current listing describes categories such as babies, couples and paydays, a photo per date and widget layouts. The 2.0.0 publication time is not recorded.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-24T16:05:29Z
    Platform
    KR · JP · US
  10. Release observed
    Photo Outlines: Coloring BookAndroid · 1.2.2 (52)

    Android public release observed

    This is the date public production availability was checked. Older listing images are not presented as captures of the new build.

    Evidence and dates
    Evidence and dates
    Public store availability checked
    Checked
  11. Material preserved
    Kkachi: Your Folk PaintingPlatform-unspecified material

    Official materials before release

    Official icon material is preserved. As of 2026-10-23 the app was unreleased; its later Google Play release is a separate record. Submissions, uploads and internal testing are not presented as release history.

    Evidence and dates
    Evidence and dates
    Official Git record
    Checked
  12. Material preserved
    PiPi Legion ChroniclePlatform-unspecified material

    Official materials for an upcoming app

    Official icon material is preserved. The app remains unreleased. Submissions, uploads and internal testing are not presented as release history.

    Evidence and dates
    Evidence and dates
    Official Git record
    Checked
  13. Public update

    Send today’s mood

    Public-store record for 1.0.13: send today’s mood as an image with only the mood and date, plus saving fixes.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-23T15:39:10Z
    Platform
    KR · JP · US
  14. Material preserved
    Skydaze: Cloud & Star GazingPlatform-unspecified material

    Official materials for an upcoming app

    Official icon material is preserved. The app remains unreleased. Submissions, uploads and internal testing are not presented as release history.

    Evidence and dates
    Evidence and dates
    Official Git record
    Checked
  15. Release observed

    Android public availability checked

    Production status and the public listing were checked. This is an observation date, not a launch date. Historical version records remain unverified.

    Evidence and dates
    Evidence and dates
    Public store availability checked
    Checked
  16. Release observed

    Android public availability checked

    Production status and the public listing were checked. This is an observation date, not a launch date. Historical version records remain unverified.

    Evidence and dates
    Evidence and dates
    Public store availability checked
    Checked
  17. Public update

    Quiz fixes and next review dates

    Public-store record for 1.0.14: fixes for the typing-quiz results and a TOPIK II pack, and next review dates on card backs.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-23T02:25:35Z
    Platform
    KR · JP · US
  18. Public update

    Public update 1.0.3

    Version and update timestamp from a preserved public-store response. Approval notification time is separate. Detailed feature changes for this record are unverified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-22T17:12:06Z
    Approval notice (UTC)
    Platform
    US
  19. Public update

    Version 1.2.1 and listing images

    Public version and official listing images were preserved. Direct capture from this exact binary is not independently verified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-22T17:04:30Z
    Submitted (UTC)
    Approval notice (UTC)
    Platform
    JP · US
  20. Public update

    Public update 1.0.2

    Version and update timestamp from a preserved public-store response. Approval notification time is separate. Detailed feature changes for this record are unverified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-21T23:59:22Z
    Approval notice (UTC)
    Platform
    US
  21. Public update

    Public update 1.1.0

    Version and update timestamp from a preserved public-store response. Approval notification time is separate. Detailed feature changes for this record are unverified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-21T20:54:32Z
    Approval notice (UTC)
    Platform
    US
  22. Approval notice

    Version 1.0.2 approval notice

    A verified approval notification, not evidence of a first launch. It does not establish a build number or the actual publication date.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-10-20T18:10:13Z
  23. Public update

    Version 1.2.0 in Korea

    The Korean response still reported 1.2.0 while Japan and the US reported 1.2.1. Regional observations are kept separate.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-19T13:21:10Z
    Submitted (UTC)
    Approval notice (UTC)
    Platform
    KR
  24. Public update

    Public update 1.0.12

    Version and update timestamp from a preserved public-store response. Approval notification time is separate. Detailed feature changes for this record are unverified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-19T00:54:35Z
    Approval notice (UTC)
    Platform
    US
  25. Public update

    Public update 1.0.10

    Version and update timestamp from a preserved public-store response. Approval notification time is separate. Detailed feature changes for this record are unverified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-18T17:25:15Z
    Approval notice (UTC)
    Platform
    US
  26. Public update

    Cabin Radio

    Layer lo-fi with rain, adjust volumes independently and change sounds during a voyage. Confirmed in the public iOS listing.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-15T19:05:28Z
    Submitted (UTC)
    Approval notice (UTC)
    Platform
    KR · JP · US
  27. Public update

    Printing and more colors

    Public-store version 1.1.2 is paired with its Git release notes: printing, PDF export, palettes and improved color selection.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-13T16:44:19Z
    Submitted (UTC)
    Approval notice (UTC)
    Platform
    KR · JP · US
  28. Public update

    Public update 1.1.5

    Version and update timestamp from a preserved public-store response. Approval notification time is separate. Detailed feature changes for this record are unverified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-13T18:17:45Z
    Approval notice (UTC)
    Platform
    US
  29. Public update

    Version 1.0.16 on the store

    A dated public-store response preserves this version and update date. Detailed release notes were not retained in this record.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    Platform
    KR · JP · US
  30. Public update

    Public update 1.0.12

    Version and update timestamp from a preserved public-store response. Approval notification time is separate. Detailed feature changes for this record are unverified.

    Evidence and dates
    Evidence and dates
    Preserved public-store response
    Checked
    UTC
    2026-10-05T14:50:25Z
    Approval notice (UTC)
    Platform
    US
  31. Material preserved

    Official screenshot set preserved

    Official images in the 20260930 folder were recorded in Git. Folder and commit dates are not store publication dates.

    Evidence and dates
    Evidence and dates
    Official Git record · 101d79e4
    Checked
  32. Approval notice

    Version 1.0.0 approval notice

    A verified approval notification, not evidence of a first launch. It does not establish a build number or the actual publication date.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-09-16T23:10:10Z
  33. Approval notice

    Version 1.0 approval

    The approval notification is verified. It does not by itself establish when the app became public.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-07-21T16:53:39Z
    Submitted (UTC)
    Approval notice (UTC)
  34. Approval notice

    Version 1.0 approval notice

    A verified approval notification, not evidence of a first launch. It does not establish a build number or the actual publication date.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-07-21T12:47:43Z
  35. Version 1.0 submitted

    A store notification confirms review submission. Submission does not establish public availability.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-07-14T08:30:00Z
  36. Approval notice

    Version 1.0 approval notice

    A verified approval notification, not evidence of a first launch. It does not establish a build number or the actual publication date.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-07-01T01:54:51Z
  37. Approval notice

    Version 1.0 approval notice

    A verified approval notification, not evidence of a first launch. It does not establish a build number or the actual publication date.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-06-18T12:30:13Z
  38. Approval notice

    Version 1.0 approval notice

    A verified approval notification, not evidence of a first launch. It does not establish a build number or the actual publication date.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-06-10T12:17:27Z
  39. Approval notice

    Version 1.0 approval notice

    A verified approval notification, not evidence of a first launch. It does not establish a build number or the actual publication date.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-06-01T19:01:15Z
  40. Material preserved
    Pomodoro at Sea: Focus TimerPlatform-unspecified material

    Early app presentation assets

    The website history preserves an icon and voyage screen. This is a Git record date, not the app’s launch date.

    Evidence and dates
    Evidence and dates
    Official Git record · 0253ac33
    Checked
  41. Approval notice

    First distribution approval notice

    Approval notification for the app then named PiPi Focus. No version was stated; its actual first public release date remains unverified.

    Evidence and dates
    Evidence and dates
    Store notification cross-check
    Checked
    UTC
    2026-05-21T09:41:05Z

A partial archive, growing from surviving evidence. Unknown dates and versions stay unknown. Internal tests and private review details are excluded.