Doubling Back vs Digital Siren
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Doubling Back
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.
- Measure walking/running distance
- Start and stop measurement
- Calculate distance for selected portions
- iPhone and iPad compatible
Read full descriptionHide full description
Doubling Back is an iPhone application for measuring your walking or running distance. What does Doubling Back offer that other pedometer apps do not? You can start and stop the measurement, and when you are finished, Doubling Back will show you the total distance for just the portions of the walk or run that you chose to measure.
Digital Siren
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.
- High-speed pursuit alerts
- Code3 emergency vehicle notifications
- Critical incident alerts
- Automatic notifications
- Map view of active events
- Call 911 integration
- Feedback submission
Read full descriptionHide full description
Digital Siren by PursuitAlert is an app that, once installed, will notify you of a high-speed pursuit, a Code3 emergency vehicle nearby, and numerous other critical incidents happening in your area. Digital Siren only requires the one-time action of downloading the Digital Siren App for your device. Once done, the user will receive the notifications automatically whenever they enter the range of a police pursuit or numerous other active critical events or emergency response. This service will be in effect for any participating state, county, or municipal law enforcement agency in the US. Thus, this service will continue to work as the user passes through various participating territories around the country. Users can pull up a map that will show their current location. If a pursuit or other event is active, a red circle will appear around their location, indicating an area where the event may be located. Users may also use the app to call 911 or to send feedback and user experience to Digital Siren by PrsuitAlert.
Screenshots
Verdict
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.
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. 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.
| Parameter | Doubling Back | Digital Siren |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 4.0 (8 ratings) |
| Number of ratings | 4 | 8 — better |
| Update frequency | Every 13 months | Every 12 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 9 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Terry NIGHTINGALE | Pursuit Alert LLC |
Customer experience
Doubling Back
Digital Siren
In-app purchases
Doubling Back
No in-app purchases
Digital Siren
No in-app purchases
