Accelerometer vs Flat Speedometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Accelerometer
Transform your device into a precise 3-axis accelerometer. Monitor live acceleration and G-force readings, record motion data, and export it in various formats for detailed analysis. Ideal for experiments, testing, and engineering.
- Realtime X/Y/Z acceleration
- G-force measurement
- Record motion sessions
- CSV/JSON/XML export
- Adjustable sample rate
- Max/Min tracking
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Turn your iPhone into a precise 3-axis accelerometer. View live acceleration and G-force data, record motion, and export everything for analysis. Features • Realtime X/Y/Z acceleration • G-force measurement • Gravity on / off • CSV / JSON / XML export • Store recorded sessions • Adjustable sample rate • Max / Min tracking • Clean, fast, offline Use it for • Physics experiments • Motion/vibration tests • Vehicle acceleration • Engineering measurements • Hobby projects and diagnostics Simple. Accurate. Instant data. Help us make Accelerometer even better by reviewing it. We'll include your feature requests in future updates.
Flat Speedometer
This app provides a clear and simple way to view your current speed in various units. It offers a HUD mode for easy in-car viewing and a feature to track your top speed. Additional sensors like accelerometer and altimeter are available via in-app purchases.
- Multiple speed units (mph, km/h, knots, m/s)
- HUD mode for car use
- Top speed tracking
- Ad-free experience
- Accelerometer (in-app purchase)
- Altimeter (in-app purchase)
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Viewing your current speed has never been simpler. With a no-nonsense user interface, this app helps you concentrate on what you really are doing. Ad-free. Measure your speed in various units; miles per hour, km per hour, knots and meters per second. It includes a HUD-mode for easily viewing your speed in the car, without having to look down. A top speed mode helps you to keep track of your highest speed. Additionally, features such as accelerometer and altimeter are available as in-app purchases. Note: Not compatible with iPod Touch or iPad Wi-Fi only.
Screenshots
Verdict
The clearest difference is rating: Flat Speedometer at 5.0 against Accelerometer's 4.0. Flat Speedometer also leads on review sentiment (67% vs 54%) and device support (4 vs 2). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Accelerometer sells 1 one-off in-app purchase and Flat Speedometer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Flat Speedometer holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 54% of Accelerometer's written reviews are positive against 67% of Flat Speedometer's.
Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on June 9, 2026 and June 3, 2026 respectively.
| Parameter | Accelerometer | Flat Speedometer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 53.7% of reviews | 66.7% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 months | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 17.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Jan Halozan | Axel Backlund |
Customer experience
Accelerometer
Flat Speedometer
In-app purchases
Accelerometer
- Accelerometer Pro$1.99
Flat Speedometer
- Altitude$0.99
- Accelerometer$0.99
