Stay organized with one plaintext file per day.
About this app
To-do list, notes, appointment book, diary, journal, and… alarm clock? All possible with one plaintext file per day. PTO brings a convenient editor and important additional functions.
Features
• Powerful text editor with undo/redo, autosave, and more. • Quickly take notes on the lockscreen, without unlocking your device. • Reminders for upcoming events (format: @12:34 -15m foobar) • Fast search through all pages. • Save and open links to other apps and webpages. • Uses no network connection. All content is local on the device. • Optional template for new pages. • Backup/import pages to/from ZIP file. • And more, see the help: https://gitlab.com/ferreum/pto/-/blob/master/app/src/main/assets/help.md
Origin
This is a (now distant) fork of billthefarmer's Diary: https://github.com/billthefarmer/diary
PTO has a lot of internal and UI changes. It focuses on usage as a general organizer instead of a Diary, though it can still be used as such, if you don't need the removed features. Most notably the markdown view has been removed, so no inline media can be displayed.
See the help file for more differences: https://gitlab.com/ferreum/pto/-/blob/master/app/src/main/assets/help.md#origin
Licensed under GPL-3.0-only, by ferreum.
What's New in v3.6.0
Imported from the F-Droid repository index.
- - Improved import of multi-day evens from calendars.
- - Reminders now work on the template file.
- - Added notice about the keep-android-open issue.
- - Reorganized settings.
- - Target Android 16 (SDK 36)
- - Fixed rare reminder miss if system wakes app too early because of clock synchronization.
Version history
Mar 2, 2026 · 1.6 MB · Android API 26–36 · code 3006000
Imported from the F-Droid repository index.
- - Improved import of multi-day evens from calendars.
- - Reminders now work on the template file.
- - Added notice about the keep-android-open issue.
- - Reorganized settings.
- - Target Android 16 (SDK 36)
- - Fixed rare reminder miss if system wakes app too early because of clock synchronization.
SHA-256 a731b57e7661a29ffd8663ba8ce01c96a998e85ddf0883e368f99d52ff01db9d
Sep 3, 2025 · 1.6 MB · Android API 26–35 · code 3005001
Imported from the F-Droid repository index.
- - Individual quick notes are now always kept as separate undo steps in the editor.
- - Fixed an issue where clicking a reminder notification could lose previously saved quick notes.
- - Reminder changes are now picked up immediately when restoring a backup.zip.
SHA-256 0d00b3e145e6fd2bcebaa51f2b003228d8bb214a0e0e4a66fcafb92d10ee5a4e
Jul 24, 2025 · 1.6 MB · Android API 26–35 · code 3005000
Imported from the F-Droid repository index.
- - Improved search in editor and next/previous match buttons.
- - Help setting up reminders and warning if battery optimizations are not ignored.
- - "Start of new day time" option has its own screen.
- - New predictive back animations from Android 14.
- - Improved event import from calendar.
- - Can now disable auto-open of keyboard when selecting today or future page.
SHA-256 1d998904bbfb724c30b5d08e167d62aadb9e08290d02784960566ebc0190f8fe
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be de.ferreum.pto is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 3.5.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall PTO - Plaintext Organizer first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of PTO - Plaintext Organizer, and a listing is removed when the evidence for it stops holding up.
Get PTO - Plaintext Organizer
Every source we list for de.ferreum.pto is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
a731b57e7661a29ffd8663ba8ce01c96a998e85ddf0883e368f99d52ff01db9d
Signing certificate
cc89788435bf3a380ea81929b3485c9aa17d359604159ce89c41fd52d7d573ab
Permissions Required
What each permission lets PTO - Plaintext Organizer do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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