For the Galaxy Z Fold 7

Read your repo
on the half that unfolds.

A native document renderer and on-device git client — the reading half of a laptop-free development loop. Browse a repository, render everything in it, then clone, diff, commit and push. Unfolded: file tree left, document right.

Download the APKv0.6.3 See why it's native →

Free · direct .apk, no unzipping · Android · v0.6.3

repo⌥

▾ render/
▾ app/src/
README.md
MainActivity.kt
Renderer.kt
▾ docs/
design.md
bench.csv
notebook.ipynb
CHANGELOG.md

README.mdserif · 15pt

FoldRender

Phases 1–4 · native Compose

A document renderer for the Samsung Galaxy Z Fold 7 — the reading half of a laptop-free development loop.

// folding is a pure relayout
LazyColumn { blocks.forEach { Block(it) } }
// activity never restarts

▸ A 5 MB document composes only what is on screen.

The engineering choice

A WebView is cheap to build and expensive every day after.

Markdown in a WebView takes an afternoon. Then text selection is the browser's, theming is a stylesheet fight, and every fold is a full page reflow. FoldRender parses to a block list instead.

WebView

Text selection belongs to the browser, not you
Theming is a stylesheet fight on every surface
Every fold / unfold triggers a page reflow
Scroll position jumps when the device changes shape

FoldRender · commonmark-java → LazyColumn

A 5 MB doc composes only what's on screen
Folding is a pure relayout — the activity never restarts
configChanges covers every axis; scroll never moves
Native selection, native theming, native speed

What it does

Everything in the repo, rendered to read.

Markdown, done properly

CommonMark + GFM: tables with alignment, task lists, strikethrough, autolinks and YAML front matter — plus mermaid, LaTeX and callouts.

Code that reads like code

Syntax-highlighted blocks with a copy button and horizontal scroll. Images resolve against relative paths in the document.

Git in your pocket

An on-device git client: clone, pull, diff, commit and push. Optional Sign in with GitHub via device flow.

Built for the hinge

Unfolded, a two-pane layout: file tree left, document right. An outline pane appears when there's width, a bottom sheet when there isn't.

A real reading surface

Theme, text size, line width and a serif toggle. Per-document scroll position, restored on reopen. Links stay tappable inside a selection.

Opens from everywhere

Registers for markdown, plain text and the share sheet — so Files, Drive, GitHub and Termux all offer FoldRender.

Questions

Before you download.

What phone does FoldRender run on?

It's built for the Samsung Galaxy Z Fold 7 and other large foldables. Unfolded it shows a file tree on the left and the rendered document on the right; folded it collapses to a single reading column. It runs on any modern Android device — the two-pane layout simply appears when there's width for it.

Why native Compose instead of a WebView?

A WebView makes text selection the browser's, turns theming into a stylesheet fight, and reflows the whole page on every fold. FoldRender parses markdown to a block list that feeds a LazyColumn, so a 5 MB document only composes what's on screen and folding the device is a pure relayout — the activity never restarts and scroll position never moves.

Can it actually push to GitHub from the phone?

Yes. FoldRender includes an on-device git client — clone, pull, diff, commit and push — plus optional Sign in with GitHub via device flow. It's the reading and reviewing half of a laptop-free development loop.

How much does it cost?

It's free. Download the latest app-debug.apk directly from GitHub Releases — no unzipping, no account required to read.

What file types can it render?

Markdown (tables, task lists, front matter, mermaid, LaTeX, callouts), syntax-highlighted source, JSON, YAML, TOML, CSV, images, PDF, HTML, plain logs and Jupyter notebooks.