All apps

Every app BattleTime ships, by the name the launcher shows, grouped as the launcher groups them at first. Apps install and uninstall from the companion app's store, the companion can move an app to another group, and Software turns each one on or off. Watch faces have their own page, Watch faces.

Most apps come from InfiniTime and wasp-os, merged into one where both had the same app; each app's page says where it came from.

Built into the firmware

These screens are part of the firmware, so they are always there and never listed in the launcher.

Screen	What it does
Notifications	The latest notifications, newest first, each with an icon coloured by its kind; a swipe down on the face opens it, and a preview pops up as one arrives.
Quick settings	A pull-down shade below the notifications: brightness, flashlight, do not disturb, Bluetooth, always on and Settings.

Time

App	What it does
Alarm	Up to twelve alarms, once or on chosen weekdays, with snooze.
Timer	A countdown of up to 99 minutes that keeps running while the app is closed.
Stopwatch	A stopwatch with laps, still counting while the watch sleeps.
Pomodoro	Work and break sessions in turn, with a long break every few rounds.

Phone

These need the phone or computer connected through the companion app.

App	What it does
Call	Opens by itself when a call comes in, to accept, reject or mute it and end it.
Music	Plays, pauses and skips the phone's music, and changes its volume.
Navigation	Turn-by-turn directions from the phone.
Weather	The current weather and the coming days' forecast from the phone.
Finder	Makes the phone ring so you can find it.
Remote	Up to nine buttons that each run an action on the phone or computer.
Notes	A read-only text note sent from the companion, such as a shopping list.
QR code	Up to eight QR codes made in the companion, shown for another phone to scan.
Prompt	A yes or no question from the companion, answered on the watch.

Health

App	What it does
Heart	Measures the heart rate and charts the latest readings.
Steps	Today's steps against the goal, the last seven days and a day by hour.
Sports	A stopwatch that counts steps too, keeping the last five sessions for the companion.

Games

App	What it does
Dice	Roll one to nine dice of up to 99 sides, by tap or shake.
4 in a row	Four in a Row against the watch, at four levels.
Life	Conway's Game of Life on a 16 by 16 board that wraps at its edges.
Paint	Finger painting on a 20 by 20 grid in eight colours.
Paddle	Keep the ball in play with a paddle that follows your finger.
15	The 15 sliding-tile puzzle, with a move count and best result.
Snake	Classic Snake on a 16 by 16 board, steered by swipes.
2048	2048: slide tiles to merge equal numbers.

Tools

App	What it does
Calculator	Adds, subtracts, multiplies and divides numbers of up to fifteen digits.
Flashlight	Turns the screen into a white or red light, at three brightness levels.
Beacon	Flashes the heart rate sensor's green LED at a chosen brightness and rate.
Level	A spirit level whose bubble turns green when the watch is level.
Motion	Charts the accelerometer's readings on each axis.
Metronome	Beats on the vibration motor, with tap tempo.
Morse	A notepad you type in Morse code with swipes.
Haiku	A new short verse each time it opens.
Hello	The smallest app, a starting point for reading app code.
Template	A starting point for a new app that answers every kind of input.

System

App	What it does
Apps	The launcher: lists the installed apps by group and opens the one you tap.
Settings	The watch's settings: screen, waking, clock, units, step goal, face and theme.
Software	Turns each installed app and face on or off.
About	Firmware, battery, memory and hardware details, a page each.
Files	Browses the watch's storage a folder at a time, with sizes.

An app whose group the watch does not have goes to Other.

Not ported

App	From	Why
demo, gallery	wasp-os	They need full-screen pictures.
disa_b_l_e	wasp-os	The Bluetooth switch in Settings and quick settings does the same.
read_me, test	wasp-os	Developer tools, not apps.
Firmware update	both	Part of the system, not an app; see Firmware updates.

To write an app of your own, start with writing an app.