Random Decision Maker

March 23, 2026 · View on GitHub

A Flipper Zero app that lets you type your own choices and let a roulette wheel decide — powered by the device's hardware true-random-number generator.

Features

Add up to 20 custom decisions (up to 20 characters each)
Roulette-style animation with a fast phase that decelerates smoothly before landing
True randomness via furi_hal_random_get() (hardware RNG, not a software PRNG)
Scrollable decision list with context-sensitive on-screen hints
Spin again or return to the list from the result screen

Screenshots

Manage	Spinning	Result

Installation

Via Flipper App Catalog (recommended)

Search for "Decision Maker" in the Flipper App Catalog and install it directly from the Flipper Mobile App or lab.flipper.net.

Manual install (`.fap` build)

Set up the Flipper Zero firmware build environment.

Clone this repo into your firmware's applications_user/ directory:

git clone https://github.com/Gerijacki/random_decision_maker.git \
    applications_user/random_decision_maker

Build and deploy the external app:

./fbt launch APPSRC=applications_user/random_decision_maker

Controls

Manage screen

Button	Action
`UP` / `DOWN`	Navigate the list (hold for fast scroll)
`OK` on "+ Add decision"	Open the keyboard to add a new entry
`OK` on a decision	Spin immediately (shortcut)
`LEFT`	Delete the highlighted decision
`RIGHT`	Spin the roulette (requires ≥ 2 decisions)
`BACK`	Exit the app

Keyboard screen

Button	Action
`OK`	Confirm and save the decision
`BACK`	Cancel and return to the list

Result screen

Button	Action
`OK`	Spin again with the same list
`BACK`	Return to the manage screen

Architecture

The app follows the standard Flipper Zero ViewDispatcher pattern with four views:

ViewIdManage     ──[spin/add]──►  ViewIdSpinning ──[done]──► ViewIdResult
     ▲                                                              │
     └──────────────────────────[BACK]──────────────────────────────┘
     ▲
ViewIdTextInput (keyboard)

A FuriTimer drives the spin animation by posting CustomEventSpinTick events to the ViewDispatcher, keeping all model mutations on the GUI thread.

Contributing

Contributions are welcome! See CONTRIBUTING.md for guidelines.