Statlet

Live information in your Android status bar. No root, no custom ROM.

Statlet puts the numbers you actually check into the status bar: the outside temperature, how fast your connection is moving right now, how hot the phone is running. They sit next to the clock and update on their own.

What it can show

Twenty icons, grouped by what they measure. Enable as many as you like, and hold a row and drag it to put them in the order you want.

Weather

• TemperatureThe outside temperature as text, in °C or °F.
• SkyConditions as a pictogram, with day and night variants.
• Feels likeApparent temperature, wind and humidity included.
• HumidityRelative humidity outside, as a percentage.
• WindSpeed ten metres up, with the direction it blows from.
• PressureBarometric pressure at sea level, in hPa.
• UV indexThe current index, named the way the WHO names it.
• PrecipitationRain or snow fallen in the last hour, in mm.

All eight come from a single request every quarter of an hour — eight icons cost exactly what two did.

Sun and moon

• SunriseDrawn as a clock, the hour above the minutes. Rolls over to tomorrow's once today's has passed.
• SunsetThe same, with the length of the day in the notification.
• Moon phaseA pictogram of the real thing, worked out on the phone from the date. No network, no location, no permission.

Network

• Network speedDownload, and optionally upload on a second line.
• Data usedA cumulative counter, with a monthly reset day and a manual one.

Battery

• BatteryCharge level, with a marker while charging.
• VoltageVolts across the pack, as the charger sees them.
• CurrentMilliamps in or out, positive while charging — so you can watch a charger deliver what it promised.

System and position

• Phone temperatureFrom the SoC sensor where the kernel exposes it, from the battery sensor otherwise.
• RAMHow much memory is in use, as a percentage.
• StorageFree space on the internal storage.
• GPS speedGround speed from the satellite receiver, in km/h, mph or m/s.

Charts

Statlet keeps what it measures. Every numeric value is written to the phone, at most once a minute, and the last two days are kept; the Charts tab draws them over one, six, twenty-four or forty-eight hours, with the lowest, average, highest and current figure under each line. With Statlet Pro you choose how long the history stays — 30 days unless you change it, or forever — and the charts reach back a week, a month, three months, a year or all of it. Past the last two days it is kept as one record per hour, with that hour’s lowest, average and highest value, so a year of it takes about 200 KB per value.

A chart is something you can read, not only look at: touch it, or drag along it, and it says the value and the time under your finger; the values are on the side and the times underneath. The arrows step back and forward through the history a window at a time, with the exact span written between them; a calendar picks any span of days that has readings, tapping the lowest or highest figure finds when it happened, and a search box finds a chart by name once there are more than a few.

None of it leaves your phone, and switching a unit does not bend the past: readings are stored the way the sensor gives them and converted when they are drawn. One switch stops the recording and deletes what it recorded; Settings shows how much space it takes and can delete all of it, or only what is older than a number of days you choose.

Alerts

Any icon showing a number can carry a threshold — above 45 °C, below 15%, above 1.5 GB of data. Crossing it gets you a notification, on a channel of its own, which is the one part of Statlet allowed to make a sound.

It notifies on the crossing rather than for as long as the condition holds, so a hot phone is one notification and not one every fifteen seconds. Repeating is a switch, and repeats at most once an hour.

Home screen widgets

Six sizes, and you can add as many of each as you like:

• 1×1One icon and its value, in a single cell.
• 4×1Up to four values in a row — the status bar, but readable.
• 2×2One value, large, with a sparkline of its last hour — or how full it is, for the battery.
• 4×2One value charted over the last hour or the last day.
• 2×2 moonTonight's phase and the days to the next full or new moon. Nothing to configure: there is one moon.
• 3×2 listEvery icon you have enabled, name and value, one per row.

Each one shows a single value — or all of them at once — and refreshes on a schedule you pick, from half an hour to a day. They sample by themselves when the icons are stopped, so the home screen works even with the status bar left entirely alone, and what they sample is charted like anything else.

The network and GPS speeds are not offered there. Half an hour is the fastest Android lets a widget refresh itself, and a speed read an hour later describes a moment that has been over for an hour; those two stay status-bar icons, where they update every couple of seconds.

Or no icons at all

There is a mode that puts nothing in the status bar and writes every value into the notification instead. Pull the shade down and it is all there; the bar looks exactly as it would without the app.

How it works

Android has no API for drawing in the status bar. What does get drawn there is a notification’s small icon — so that is what Statlet uses. Every icon you enable is a silent, ongoing notification whose small icon the app redraws with the current value.

That is the whole mechanism, and it is why the app needs no root and no special privileges. It also means the icons play by the notification system’s rules:

• Android 15 and earlier — each widget gets its own icon.
• Android 16 and later — the system bundles an app’s notifications and draws a single icon for the group. Statlet shows one icon and cycles it through your enabled values — or only the ones you pick, with Statlet Pro; pull the shade down and every value is readable at once.

Each icon gets its own notification channel, so any one of them can be muted or hidden from the system settings without touching the others.

Weather without an account

Weather comes from Open-Meteo, which needs no API key and no sign-up. If you prefer OpenWeatherMap, enter your own API key in the settings — it stays on your device, and Statlet ships none of its own.

Location is optional: grant approximate location, or just search for a city by name.

Privacy in one paragraph

No advertising. There has never been an ad in any of my apps and there will not be one — not in the free version, not anywhere.

No account and no sign-up either. Your coordinates go to the weather service when a weather icon is enabled, and nothing else leaves the device unless you send it: a bug report, a name for the supporters list, or the optional crash reports and usage statistics — none of which ever includes what your icons measure. The full text is on the Privacy Policy page.

Get it

Statlet requires Android 6.0 or later. There are two builds, and they are the same app:

Google Play — Statlet on Google Play. Updates arrive by themselves. Statlet Pro is a monthly or a yearly subscription.

Direct download — a build with no Google Play Billing and no Firebase compiled into it at all. Every Pro feature is unlocked in it from the first run, since a build with no store has no purchase it could verify; a donation is what keeps it maintained. Whoever supports the app — donation or subscription, the two count the same — can choose to be named on the supporters page, under whatever name they like, and change their mind about either at any time.

It is published in an F-Droid repository of my own. Add this URL in F-Droid — or as a source in Obtainium, which reads the same repository and installs new versions as they appear:

https://releases.android.apps.gpm.name/repo

On a phone that already has F-Droid, this link adds the repository in one tap, fingerprint included.

Either way updates arrive on their own, checked against the repository signature. If you want to verify what you are adding, its fingerprint is:

C983 7356 6EEC 235E CEFB 7D29 A582 6367 4D80 B432 8699 2BCB 7ACB 3AA4 3CA3 C41E

This is a binary repository: I build and sign the APK, F-Droid only serves it. It is not part of f-droid.org, whose policy starts at published source.

• Changelog — what changed in each release
• Privacy Policy · Terms of Service