# Doubling Back vs BarLock

The clearest difference is rating: Doubling Back at 3.7 against BarLock's 3.0. Doubling Back also leads on in-app purchases (none vs 1) and device support (3 vs 1). BarLock's advantage is update cadence (every 3 days vs every 13 months). On price, ratings volume and ads there is nothing between them.

Both are free to download. BarLock sells 1 one-off in-app purchase. Doubling Back asks for nothing beyond the download.

Doubling Back holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

Doubling Back ships an update every 13 months, BarLock every 3 days. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Doubling Back | BarLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/doubling-back/id1217167960/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/barlock-barcode-alarm/id6772532044/reviews) |
| Number of ratings | **3** | 2 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 9 MB | 32 MB |
| Requires iOS | **12.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Terry NIGHTINGALE](https://appshunter.io/developer/1217167959) | [CODE IN MOTION SRL](https://appshunter.io/developer/1896060625) |

## What reviewers say

### 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


### BarLock

[App page](https://appshunter.io/ios/app/barlock-barcode-alarm/id6772532044)

This app helps you wake up by requiring you to scan a unique barcode or QR code from an item across the room to turn off your alarm. It prevents snoozing and ensures you physically get out of bed.

**Highlights:** Barcode and QR code alarm missions, Exact-code matching, Full-screen Scan to Stop, Wrong-item protection, Wake-up check after dismissal, No ads or tracking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BarLock PRO Lifetime | $7.49 | one-time |


## Frequently asked questions

### Is Doubling Back free?

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

### Is BarLock free?

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

### Which has better reviews, Doubling Back or BarLock?

Doubling Back is rated higher. Doubling Back averages 3.7 out of 5 from 3 ratings, while BarLock averages 3.0 from 2 ratings.

### Do Doubling Back or BarLock have ads?

Neither Doubling Back nor BarLock shows ads.

### Which is updated more often, Doubling Back or BarLock?

Doubling Back ships an update every 13 months, and BarLock every 3 days. Most recently, Doubling Back was updated on September 18, 2026 and BarLock on September 23, 2026.

---

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