DeviceLabOffroad

Steps

1. 01Open the app. The 8-step tutorial runs by itself the first time; run it again any time with Start Tutorial.
2. 02Tap a card or button to open that tool. Floating Monitor is the exception: it switches the overlay on or off.
3. 03Check the status light on each field tool: green is ready, amber needs a permission, setting or connection, unlit means no sensor.
4. 04Reorder or hide whole sections in Settings → Customize Dashboard, then tap Save Changes.

Good to know

• Status lights are checked each time you return to the main screen, and TalkBack reads them aloud.
• Every permission is optional. The app asks when you open a tool that needs it, and that tool explains what is missing.
• Long-press the app icon for shortcuts: Health Scan, Battery, Network and Export.

Steps

1. 01Dials swing toward each reading with a short, damped motion.
2. 02The green digital window inside a dial always shows the exact value, even when the needle has reached the end of its scale.
3. 03Dashes mean there is no reading yet or the phone cannot provide one; needles then rest at the start of the scale.

Good to know

• With Android’s animations turned off (Accessibility → Remove animations), needles jump straight to the value.
• Readings depend on your phone’s hardware and are not certified measurements.

Steps

1. 01Allow precise location (approximate is not enough) and turn Location on.
2. 02Tap START. The app takes one fix a second and shows the recording time and sample count.
3. 03Tap STOP, then export the session with JSON, CSV or PDF.

Good to know

• Go outside with a clear view of the sky; a fix can take longer without a data connection.
• Positions stay in this screen’s memory (up to 6,000 fixes) and are discarded when it closes unless you export them.
• There are no maps, waypoints, routes or sky plot. Carry dedicated navigation equipment and paper maps for remote travel.

Steps

1. 01Hold the phone flat, away from the vehicle body, metal, speakers and cables.
2. 02Read the heading in the centre of the dial and check that MAGNETIC FIELD reads Normal Earth Field (25–65 µT).
3. 03For Metal Detector Mode, hold the phone still, switch it on and let it take a baseline from the next 30 readings.
4. 04START and STOP record heading and field strength; export with JSON, CSV or PDF.

Good to know

• The heading points to magnetic north; the app does not correct for declination.
• The app has no calibration step of its own. Moving the phone in a figure-8 helps Android recalibrate on many phones.
• Needs a magnetometer.

Steps

1. 01Tap START to monitor and record; STOP to finish.
2. 02Read ESTIMATED ALTITUDE and ATMOSPHERIC PRESSURE in the windows, and the ALTITUDE TREND chart below.
3. 03Export with JSON, CSV or PDF.

Good to know

• Altitude assumes the standard sea-level pressure of 1013.25 hPa, so it shifts with the weather. It is most useful for changes over a short time.
• There is no calibration to a known elevation on this screen. GNSS Measurements shows the receiver’s altitude.
• Needs a barometer; without one the readings show N/A and START is disabled.

Steps

1. 01Mount the phone firmly or set it on the surface you want to measure.
2. 02Read PITCH ANGLE (forward/back) and ROLL ANGLE (left/right) in degrees.
3. 03START and STOP record the angles; export with JSON, CSV or PDF.

Good to know

• The dials shade 20–30° amber and beyond 30° red. These are rules of thumb, not your vehicle’s rated limits; check its manual.
• Angles come from gravity, so they are only meaningful while the phone is still.
• There is no zero button: measure a known level surface to see the offset. It is not a vehicle safety system.

Steps

1. 01Mount the phone firmly and lay it flat for a centred ball.
2. 02Tap START. The amber ring marks the highest combined X/Y value since START.
3. 03Tap STOP and export with JSON, CSV or PDF.

Good to know

• Values follow the phone’s axes, so “forward” depends on how the phone is mounted.
• A recording keeps up to 6,000 samples, about two minutes.
• Never use the app while driving.

Steps

1. 01Put the phone flat on a solid surface.
2. 02Tap START, then STOP; export with JSON, CSV or PDF.

Good to know

• A phone cannot measure an earthquake’s magnitude, so no Richter or other magnitude is shown.
• Touching or moving the phone registers as vibration.

Steps

1. 01Tap START. Allow the microphone only if you want the sound level; everything else works without it.
2. 02Sensors your phone lacks show N/A and are listed under the status line.
3. 03Tap STOP and export with JSON, CSV or PDF.

Good to know

• The comfort score uses temperature, humidity and light only. It is not an air-quality or weather measurement, and there is no forecast.
• The sound level is relative to your microphone, not a calibrated meter. Audio is never recorded or saved.
• Many phones have no ambient temperature or humidity sensor.

Steps

1. 01Tap START (or START RECORDING on Component Temperature and Luminescence Meter).
2. 02A recording keeps up to 6,000 samples; after that the screen shows live values only.
3. 03Export with JSON, CSV or PDF. Settings → Export Data also exports system snapshots, app usage and reports.
4. 04Files go to Android/data/com.devicelab.offroad/files/Documents/DeviceLabOffroadExports; share or delete them from the Export screen.

Good to know

• GNSS, compass, altimeter, seismometer and environmental recordings can only be exported from their own screens.
• Exports are removed if you uninstall the app.

Steps

1. 01Choose an Update Interval from 15 minutes to 6 hours, and a History Retention of 7 to 90 days.
2. 02Open Health History and pick TODAY, WEEK or MONTH for averages, a trend and four charts.
3. 03Add the System monitor, Battery or Health score widget from your home screen’s widget list.

Good to know

• The health score is the average of free memory %, battery charge % and free storage %. It is the app’s own indicator, not a battery-health rating.
• Android may run background snapshots later than scheduled.

Steps

1. 01Cache Cleaner lists apps with more than 100 KB of cache; tap one for App info → Storage → Clear cache.
2. 02RAM Booster on Android 13 and earlier asks Android to stop background apps and shows the measured change in available memory, which can be 0 or negative.
3. 03Battery Saver opens Android’s Battery Saver, battery usage and display settings.

Good to know

• System Maintenance and Optimizer clear only DeviceLab Offroad’s own cache and report the measured amount.
• Cache Cleaner, Wake Lock Detector and the app-usage screens need Usage Access.

Steps

1. 01Tap Start Test (later Test Again).
2. 02Ping is the median of 5 connection times; download runs up to 5 MB or 10 seconds; upload sends 1 MB.

Good to know

• A test uses up to about 6 MB of data and needs an internet connection.
• If a step fails, the screen shows an error instead of a number.

Steps

1. 01Wi-Fi: turn Wi-Fi and Location on, allow precise location, then tap SCAN NETWORKS.
2. 02Bluetooth: allow Nearby devices (Android 12+) or location (Android 11 and lower), then tap SCAN DEVICES.

Good to know

• Android allows only a few Wi-Fi scans every two minutes, so a new scan can return the previous results.
• The app does not connect, pair or keep a history of what it finds.