# Doubling Back vs Digital Siren

The clearest difference is device support: Doubling Back at 3 against Digital Siren's 1. Doubling Back also leads on iOS requirement (12.0 vs 16.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.0 for Doubling Back against 4.0 for Digital Siren. Both are backed by a comparable volume of ratings — 4 and 8 respectively.

Doubling Back ships an update every 13 months, Digital Siren every 12 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Doubling Back | Digital Siren |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/doubling-back/id1217167960/reviews) | [4.0 (8 ratings)](https://appshunter.io/ios/app/digital-siren/id1551484127/reviews) |
| Number of ratings | 4 | **8** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 12 months** |
| Monetization | Free | Free |
| Size | 9 MB | 14 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Terry NIGHTINGALE](https://appshunter.io/developer/1217167959) | [Pursuit Alert LLC](https://appshunter.io/developer/1082131522) |

## 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


### Digital Siren

[App page](https://appshunter.io/ios/app/digital-siren/id1551484127)

Receive real-time alerts for high-speed pursuits, emergency vehicles, and other critical incidents. The app automatically notifies you when you enter the range of an active event in participating US law enforcement agency territories. View a map showing your location and active event areas.

**Highlights:** High-speed pursuit alerts, Code3 emergency vehicle notifications, Critical incident alerts, Automatic notifications, Map view of active events, Call 911 integration, Feedback submission

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Doubling Back free?

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

### Is Digital Siren free?

Digital Siren is free to download, with no in-app purchases.

### Which has better reviews, Doubling Back or Digital Siren?

Doubling Back and Digital Siren are both rated 4.0 out of 5 on the App Store, from 4 and 8 ratings respectively.

### Do Doubling Back or Digital Siren have ads?

Neither Doubling Back nor Digital Siren shows ads.

### Which is updated more often, Doubling Back or Digital Siren?

Doubling Back ships an update every 13 months, and Digital Siren every 12 months. Most recently, Doubling Back was updated on October 24, 2026 and Digital Siren on October 18, 2026.

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