# Gpsvcs vs Backflow Pro

The clearest difference is rating: Backflow Pro at 5.0 against Gpsvcs's 3.9. Gpsvcs's advantage is in-app purchases (none vs 5) and ratings volume (7 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Backflow Pro sells 5 in-app purchases, starting at $3.99 per month. Gpsvcs asks for nothing beyond the download.

Backflow Pro holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Gpsvcs has 7 ratings behind it against 1, so its average is the more settled of the two.

Gpsvcs ships an update fortnightly, Backflow Pro every 3 weeks. The most recent releases landed on June 4, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Gpsvcs | Backflow Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (7 ratings)](https://appshunter.io/ios/app/gpsvcs/id1607486602/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/backflow-pro/id1643496459/reviews)** |
| Number of ratings | **7** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 56 MB | 22 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dark Sky](https://appshunter.io/developer/1602508637) | [Time Lock Documentation, LLC](https://appshunter.io/developer/1196195710) |

## What reviewers say

### Gpsvcs

[App page](https://appshunter.io/ios/app/gpsvcs/id1607486602)

This app allows users to view and pay for parking infractions by entering their license plate. Upon payment, a release code and instructions are provided within the app. Funds are processed through a third-party merchant.

**Highlights:** View parking infractions, Pay infractions online, License plate lookup, Receive release codes, Payment processing

**In-app purchases:** none


### Backflow Pro

[App page](https://appshunter.io/ios/app/backflow-pro/id1643496459)

This app digitizes backflow prevention documentation, creating secure, visual records with time-stamped photos and GPS data. It streamlines compliance letters, invoices, and repair tracking for building and facility professionals.

**Highlights:** Digital backflow prevention program creation, Time-stamped and GPS-stamped photo embedding, Electronic signature capture, Automated compliance letters and invoices, Cloud syncing across multiple devices, Scheduling calendar with push notifications, Organized file storage by project and client

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stand Alone Plan | $3.99 | per month |
| Bronze Plan | $29.99 | per month |
| Silver Plan | $49.99 | per month |
| Gold Plan | $71.99 | per month |
| Platinum Plan | $80.99 | per month |


## Frequently asked questions

### Is Gpsvcs free?

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

### Is Backflow Pro free?

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

### Which has better reviews, Gpsvcs or Backflow Pro?

Backflow Pro is rated higher. Gpsvcs averages 3.9 out of 5 from 7 ratings, while Backflow Pro averages 5.0 from 1 ratings.

### Do Gpsvcs or Backflow Pro have ads?

Neither Gpsvcs nor Backflow Pro shows ads.

### Which is updated more often, Gpsvcs or Backflow Pro?

Gpsvcs ships an update fortnightly, and Backflow Pro every 3 weeks. Most recently, Gpsvcs was updated on June 4, 2026 and Backflow Pro on June 1, 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.*