A developer's field notes
Android Apps
Reading in bed, glancing at a clock before sleep. Small Android apps that smooth out everyday phone annoyances — on Google Play.
Auto, 0°, 90°, 180°, 270° — lock screen orientation your way
Tired of the screen flipping when you don't want it? Lock orientation to portrait, landscape, or auto in one tap, with per-app rules that apply automatically. Great for reading webtoons, watching videos in bed, or mounting a tablet on a stand.
Turn your charging phone into a bedside clock and standby display
A screen saver that turns your charging Android phone into an iPhone-StandBy-style bedside display. Swipe between clock, photo, dashboard, and clock+calendar modes; pick AMOLED black, amber, or night red themes; and glance at your real calendar events from across the room.
A ledger you open and close per event, then seal with a report
Record event-based ledgers — wedding gifts, trip expenses — the kind you need when you reciprocate years later. Type a name and tap a preset amount to save in three seconds; open a ledger per event and close it with a settlement report. Record who paid what and the app works out who sends money to whom, and save it as an image or CSV. It never touches your contacts — the list stays on this device and is never sent to a server.
Not just how loud now — a record of when and how long
Measures noise in dB through the mic and saves each measurement as a session, leaving a time-stamped log. For situations like upstairs noise where when and how long matters more than how loud, it organizes everything into a reference report.
Hang frames, shelves, and TVs straight — right now
Reads the device's tilt with the accelerometer and magnetometer to stand in for a physical level. When the phone is flat against a wall and you can't see the screen, vibration and sound tell you the moment it's level.
Check for metal in the wall before you drill
Reads magnetic field changes to estimate the location of nails, metal studs, and pipes inside walls. A proximity beep and vibration work even with the phone flat against the wall. It detects metal only and is a reference tool — double-check with professional equipment before any construction.
Estimate real capacity and wear from one charge cycle
Estimates your battery's real capacity from charge changes during a charging session, then calculates wear against the design capacity. Handy for proving or checking battery condition before a used-phone deal. Results are estimates that appear after one full charge cycle.
SoC to live sensor readings — your phone's full spec sheet
View SoC, memory, display, camera, sensors, battery, and system info in one place. Sensors show live readings instead of a static list, and everything exports as a spec card image — perfect for verifying a used phone on the spot.