Apps

Every Plain Text Office app in one place, each with links to where you can get it. Every app does a single job well, keeps your work in files you control, and asks for no account.

Fin Calc app icon

Fin Calc

A decimal calculator for everyday and financial sums. 0.1 + 0.2 is exactly 0.3, your calculation tape is saved between sessions, and any past result can be reused or exported as CSV. Free and open source, with optional Premium tools.

Get it: Google Play
More: Source code

Plain RTF app icon

Plain RTF

A lightweight editor for quick notes with fonts, colors, lists, tables and images. Notes are saved in a documented plain-text format, wherever you choose, and open on both Android and Windows. It uses its own format, not Microsoft RTF.

Get it: Google Play · Windows installer · Windows portable
More: Source code · Setup guide

Plain Todo app icon

Plain Todo

A task list that lives in a plain-text todo.txt file you can open with any other todo.txt app. Priorities, due dates, projects and contexts, with sorting, grouping and an optional direct Dropbox connection.

Get it: Google Play

Text CSV app icon

Text CSV

A CSV and TSV editor that treats every cell as plain text. Leading zeroes, dates, long numbers and formulas stay exactly as typed. Free for up to three documents; optional Premium adds unlimited documents, undo, find and replace, sorting and more export formats.

Get it: Google Play

Plain JSON app icon

Plain JSON

A read-only viewer for JSON, JSON Lines and JSONC files. Browse nested values in a clear tree, search, and copy any path or value without changing the file. JSON files up to 20 MiB are free; a one-time purchase unlocks the rest.

Get it: Google Play

Text Math app icon

Text Math

Mental arithmetic practice for teens and adults. Short workouts of 3, 5 or 10 problems, with hints and two ways to reach each answer. Problems are generated on your device, so it works offline.

Get it: Google Play

Open PDF app icon

Open PDF

Read and work with PDFs on your Windows computer. Search and navigate documents, organize pages, make light edits, and keep your notes inside the PDF itself.

Get it: Windows installer · Windows portable
More: Source code · Setup guide

Plain History app icon

Plain History

Version history for your writing. Pick the plain-text documents that matter, save snapshots as you go, then compare or restore earlier drafts. A Windows command-line tool, with a desktop interface you can run from source.

Get it: Windows installer · Windows portable
More: Source code

Plain Text Memory MCP icon

Plain Text Memory MCP

Shared, searchable project memory for AI assistants, stored in local Markdown files. Decisions and context stay with your project and work across compatible MCP clients.

Get it: PyPI
More: Source code

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