# Flat Speedometer vs Doubling Back

The clearest difference is rating: Flat Speedometer at 5.0 against Doubling Back's 3.7. Flat Speedometer also leads on update cadence (every 5 months vs every 13 months) and iOS requirement (9.0 vs 12.0). Doubling Back's advantage is in-app purchases (none vs 2) and ratings volume (3 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Flat Speedometer sells 2 one-off in-app purchases. Doubling Back asks for nothing beyond the download.

Flat Speedometer holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Flat Speedometer ships an update every 5 months, Doubling Back every 13 months. The most recent releases landed on June 3, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Flat Speedometer | Doubling Back |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flat-speedometer/id900609236/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/doubling-back/id1217167960/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 13 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 32 MB | 9 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Axel Backlund](https://appshunter.io/developer/1387836438) | [Terry NIGHTINGALE](https://appshunter.io/developer/1217167959) |

## What reviewers say

### Flat Speedometer

[App page](https://appshunter.io/ios/app/flat-speedometer/id900609236)

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.

**Highlights:** 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)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Altitude | $0.99 | one-time |
| Accelerometer | $0.99 | one-time |


### Doubling Back

[App page](https://appshunter.io/ios/app/doubling-back/id1217167960)

This utility app allows you to precisely measure walking or running distances. You can start and stop tracking at any point, and it calculates the total distance covered only during the measured segments.

**Highlights:** Measure walking/running distance, Start and stop measurement, Calculate distance for selected portions, iPhone and iPad compatible

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flat Speedometer free?

Flat Speedometer is free to download, with in-app purchases available.

### Is Doubling Back free?

Doubling Back is free to download, with no in-app purchases.

### Which has better reviews, Flat Speedometer or Doubling Back?

Flat Speedometer is rated higher. Flat Speedometer averages 5.0 out of 5 from 1 ratings, while Doubling Back averages 3.7 from 3 ratings.

### Do Flat Speedometer or Doubling Back have ads?

Neither Flat Speedometer nor Doubling Back shows ads.

### Which is updated more often, Flat Speedometer or Doubling Back?

Flat Speedometer ships an update every 5 months, and Doubling Back every 13 months. Most recently, Flat Speedometer was updated on June 3, 2026 and Doubling Back on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*