# Municipal Backflow vs Backflow Pro

The clearest difference is in-app purchases: Municipal Backflow at none against Backflow Pro's 5. Municipal Backflow also leads on iOS requirement (13.0 vs 15.6). Backflow Pro's advantage is update cadence (every 3 weeks vs every 11 months). On price, 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. Municipal Backflow asks for nothing beyond the download.

Municipal Backflow ships an update every 11 months, Backflow Pro every 3 weeks. The most recent releases landed on September 19, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Municipal Backflow | Backflow Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/backflow-pro/id1643496459/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 22 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Municipal Backflow LLC](https://appshunter.io/developer/1412696701) | [Time Lock Documentation, LLC](https://appshunter.io/developer/1196195710) |

## What reviewers say

### Municipal Backflow

[App page](https://appshunter.io/ios/app/municipal-backflow/id1550822887)

**Features:** macOS Compatibility

**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 Municipal Backflow free?

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

### Is Backflow Pro free?

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

### Do Municipal Backflow or Backflow Pro have ads?

Neither Municipal Backflow nor Backflow Pro shows ads.

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

Municipal Backflow ships an update every 11 months, and Backflow Pro every 3 weeks. Most recently, Municipal Backflow was updated on September 19, 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.*