Flash, sideload and rescue a second Android device - straight from your rooted phone.
No PC. No cables to a computer. Just an OTG cable and Termux.

📲 Install  ·  🚀 Use it  ·  🧭 Features  ·  🔄 Update  ·  🆘 Help

✨ What is FlashKit?

FlashKit turns your rooted phone into a pocket flashing station. Plug a second device into it with an OTG cable and use big, friendly buttons (a real Android app screen, not a wall of text) to sideload ROMs, flash images, do GSI installs, fix a black-screen recovery, and more. It even has a built-in file manager with zip tools.

🧩 Installs itself - one command sets up everything, including the Termux:GUI and Termux:API apps. 🔐 Signature-aware - picks the plugin builds that match your Termux, so they actually work together. 🛡️ Careful by design - confirmations, type-to-confirm for risky partitions, a real Cancel button. 📜 Live logs - see what adb/fastboot (and your recovery) are doing, copy them with one tap. 🔄 One-command updates - flashkit update. Home screen shown as an illustration built from the app's real icons.

✅ Before you start

You need	Why
📱 A rooted Android phone (Magisk or KernelSU)	Root is used only for the adb / fastboot calls
🖥️ Termux from F-Droid or GitHub	Not the Google Play version - it is outdated and can't run the plugins
🔌 An OTG cable / adapter	To connect the device you want to flash
🌐 Internet (first install only)	To download packages and the two plugin apps

Tip

Install Termux and its plugins from the same place (all F-Droid or all GitHub). FlashKit's installer checks this for you.

📲 Install in 3 steps

Step 1  ·  Open Termux and paste this one line

pkg install -y git && git clone https://github.com/shivrajtode/flashkit && bash flashkit/install.sh

Step 2  ·  Say Yes to the pop-ups

The installer does the rest. Android may ask you a few things - this is what to tap:

You see	Tap
"Allow Termux to access photos, media and files?"	Allow
Superuser request (Magisk / KernelSU)	Grant (tick remember)
Package installer "Do you want to install this app?" (only if you have no root)	Install - if it says "not allowed", tap Settings → turn on Allow from this source → go back → Install

Note

Installing a plugin can make Android restart Termux once. That's normal - just open Termux again and the FlashKit menu opens by itself.

Step 3  ·  Choose Start FlashKit

When the installer finishes, the FlashKit menu opens. Press Start FlashKit - the app window appears. 🎉

What does the installer actually do? (click to see)

1. Installs python, android-tools (adb + fastboot), git, curl, termux-api, dialog.
2. Installs the termuxgui Python library.
3. Asks for storage access (so it can see your ROM zips).
4. Creates the commands flashkit and start flashkit (plus a FlashKit entry for the Termux:Widget home-screen widget).
5. Reads your Termux signing key, then downloads Termux:GUI and Termux:API from GitHub / F-Droid - only a build signed with the same key is accepted - and installs them (silently with root, or via Android's installer).
6. Opens FlashKit.

Plugins you already have installed and working are never touched. Run flashkit setup any time to repeat it safely.

🚀 Open FlashKit

Type this in Termux:

flashkit

Menu entry	What it does
▶️ Start FlashKit	Opens the app
🔧 Run manually (text menu)	The older keyboard-driven version, for when you prefer text
⬇️ Update FlashKit	Gets the latest version from GitHub
🧩 Check / install Termux:GUI + Termux:API	Re-checks the two plugin apps
🩺 Doctor	Checks root, adb/fastboot, plugins, storage permission
🔁 Open FlashKit when Termux starts	Turn on to skip typing the command

Shortcuts: start flashkit or flashkit start open the app straight away.

🧭 What can it do?

🏠 Home - the big buttons

Button	What it does
Sideload a ROM zip	Pick a zip → FlashKit checks the device is ready → sideloads it, shows progress and the recovery's install log (live when your recovery allows it)
Flash an image	Choose a partition (boot, recovery, vbmeta, dtbo...) → pick the .img → confirm. Risky partitions need you to type the name
Install an APK	Install an app on the connected device (adb)
Reboot target	Reboot to system, recovery, bootloader or fastbootd
Erase a partition	Three gates (two warnings, then type the exact name) before anything is erased
GSI flash	Clean or dirty GSI install done in 3 safe stages (vbmeta → fastbootd → system/super)
Recovery fix	Fixes the black screen in some recoveries (mounts the vendor partition)
Refresh status / Fix connection	Re-detect the device, or repair adb/fastboot if they crash

📂 Files · 🗜️ Storage · 💻 Console · ⚙️ Settings

• Files - browse the target device's storage; push, pull, move and delete.
• Storage - your own phone's files, with zip tools: look inside a zip/tar without extracting · extract all or only what you pick · view a file inside · add, delete, rename and move things inside a zip · copy, move, rename, delete, compress.
• Console - ready-made adb / fastboot commands, or type your own.
• Settings - auto-fix, keep-screen-on, live install log, device auto-check, diagnostics, and Quit completely (force-stops everything).

📖 Step-by-step walkthroughs: docs/GUIDE.md  ·  📝 What changed: CHANGELOG.md

🔄 Update

flashkit update

Gets the newest version from GitHub, shows what's new, and refreshes anything needed. Your settings are kept.

🧰 Command cheat-sheet

Command	Does
flashkit	Open the menu
flashkit start · start flashkit	Open the app right away
flashkit manual	Text-menu version
flashkit update	Update
flashkit plugins	Check / install Termux:GUI + Termux:API
flashkit doctor (or check)	Health check
flashkit autostart on / off	Open the menu when Termux starts
flashkit setup	Re-run the installer
flashkit uninstall (-y for everything, no questions)	Remove FlashKit - asks what to delete (settings, the app files, Termux:GUI/API), or does all of it with -y

🆘 Help & troubleshooting

"Signature" or "plugin" message / Termux:GUI won't install

Termux and its plugins only work together if they're signed by the same key. FlashKit reads your Termux's key and picks the matching download automatically. If it says nothing matches, reinstall Termux, Termux:GUI and Termux:API all from F-Droid (or all from GitHub), then run flashkit plugins.

Termux closed while installing

Normal - Android restarts Termux when a plugin is installed. Open Termux again; the FlashKit menu opens on its own (or type flashkit).

"Root denied" / the app can't flash

Open your root manager (Magisk / KernelSU) and allow **Termux**. Then run flashkit doctor - it should say root works.

The target device isn't detected

• Use a good OTG cable and plug it into the target end correctly; try another cable.
• Put the target in the right mode (adb on, or bootloader / fastbootd, or recovery with sideload).
• Tap Refresh status on Home. If the card says adb/fastboot are broken, tap Fix connection now.
• MediaTek BROM and Qualcomm EDL modes are recognised and explained, but need other tools (SP Flash Tool, mtkclient, EDL tools).

The app window doesn't open

Run flashkit doctor. Make sure Termux:GUI is installed, then try flashkit plugins. Look at ~/flashkit_gui.log for details. If a window still won't appear, allow Display over other apps for Termux and Termux:GUI in Android settings.

A job seems stuck

Tap Cancel job on the job screen - it stops the whole process tree. Then Copy the output if you want to share it.

How do I uninstall FlashKit completely?

flashkit uninstall -y

That removes the flashkit / start flashkit commands, the Termux:Widget shortcut, the auto-start hook, FlashKit's settings and logs, the app files themselves, and uninstalls Termux:GUI and Termux:API. Run flashkit uninstall with no flag to be asked about each of those instead (handy if you want to keep the plugin apps for something else).

Where are the logs?

~/flashkit_gui.log (app) and ~/.flashkit/ (installer). Open an issue and paste flashkit doctor.

🔒 Safety

Warning

Flashing can erase data or make a device unbootable. Use files made for your exact device, charge both devices, back up what matters, and read each confirmation before you tap. FlashKit is provided as-is, at your own risk.

 

If FlashKit saved you a trip to a PC, drop a ⭐ on the repo - it really helps!

_{MIT licensed · see LICENSE}