feat: phase 5 — mobile-to-mobile (iPhone → Android over OTG) #6

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opened 2026-05-15 04:53:53 +00:00 by hartle-tech · 0 comments

hartle-tech commented

2026-05-15 04:53:53 +00:00

(Migrated from github.com)

S01E15 — Sockless No More

Backup an iPhone directly to an Android phone via USB-C OTG, no laptop in the loop.

Why

Travelers, journalists, anyone without their main machine. The iPhone Pro Max camera burns through 500 GB/month for some users; offloading on the road to an Android phone with a microSD or external SSD is a real workflow.

Scope

Native Android app written in Kotlin / Jetpack Compose.
USB host-mode access to the iPhone via libusb + a Kotlin/JNI binding (or pure-Kotlin AFC implementation — research needed).
The pull engine semantics from `internal/backup` re-implemented in Kotlin. (Or expose the Go engine as a shared library and call from Android.)
UI: same v2 brand identity, adapted to Compose Material 3 with the DumpSock palette.

Out of scope for v1

Android → iPhone direction.
Pulling to cloud storage from Android.

Acceptance

Android app installed via APK from GitHub Releases (sideload via Sideloadly Android or direct .apk install).
Plug iPhone into Android via USB-C cable, tap "Trust" on iPhone, app discovers iPhone, dumps to Android storage.
All Phase 1 CLI flags' behavior replicated (since-until, delete-after, dedup, etc.).

## S01E15 — *Sockless No More* Backup an iPhone directly to an Android phone via USB-C OTG, no laptop in the loop. ## Why Travelers, journalists, anyone without their main machine. The iPhone Pro Max camera burns through 500 GB/month for some users; offloading on the road to an Android phone with a microSD or external SSD is a real workflow. ## Scope - Native Android app written in Kotlin / Jetpack Compose. - USB host-mode access to the iPhone via libusb + a Kotlin/JNI binding (or pure-Kotlin AFC implementation — research needed). - The pull engine semantics from \`internal/backup\` re-implemented in Kotlin. (Or expose the Go engine as a shared library and call from Android.) - UI: same v2 brand identity, adapted to Compose Material 3 with the DumpSock palette. ## Out of scope for v1 - Android → iPhone direction. - Pulling to cloud storage from Android. ## Acceptance - Android app installed via APK from GitHub Releases (sideload via Sideloadly Android or direct .apk install). - Plug iPhone into Android via USB-C cable, tap \"Trust\" on iPhone, app discovers iPhone, dumps to Android storage. - All Phase 1 CLI flags' behavior replicated (since-until, delete-after, dedup, etc.).

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Reference

hartle-tech/dumpsock#6

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