# Plumber Invoices & Estimates vs Backflow Pro

The clearest difference is price: Backflow Pro at Free against Plumber Invoices & Estimates's $7.99. Backflow Pro also leads on rating (5.0 vs 3.6) and update cadence (every 3 weeks vs every 3 months). Plumber Invoices & Estimates's advantage is ratings volume (12 vs 1) and chart position (#112 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Backflow Pro is free to download; Plumber Invoices & Estimates costs $7.99 up front. Plumber Invoices & Estimates sells 8 one-off in-app purchases and Backflow Pro sells 5 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Backflow Pro holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Plumber Invoices & Estimates has 12 ratings behind it against 1, so its average is the more settled of the two.

Plumber Invoices & Estimates ships an update every 3 months, Backflow Pro every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Plumber Invoices & Estimates | Backflow Pro |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | [3.6 (12 ratings)](https://appshunter.io/ios/app/plumber-invoices-and-estimates/id632680370/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/backflow-pro/id1643496459/reviews)** |
| Number of ratings | **12** | 1 |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#112** | — |
| Size | 132 MB | 22 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JZ Mobile LLC](https://appshunter.io/developer/390988405) | [Time Lock Documentation, LLC](https://appshunter.io/developer/1196195710) |

## What reviewers say

### Plumber Invoices & Estimates

[App page](https://appshunter.io/ios/app/plumber-invoices-and-estimates/id632680370)

**Currently charting:** #112 Top Paid · Business (US App Store)

This app helps plumbing professionals manage their business by creating estimates and invoices, scheduling appointments, and tracking client information. It offers financial analysis, inventory control, and document customization for a streamlined workflow. All data is stored locally on your device.

**Highlights:** Create estimates and invoices, Client-focused scheduling, Contact management, Inventory control, Profit & loss analysis, Signature capture, Document customization

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Messages & Reminders | $3.99 | one-time |
| Scheduler | $3.99 | one-time |
| Estimates Bids & Quotes | $4.99 | one-time |
| Cloud Sync | $6.99 | one-time |
| Profits Expenses & PDF Reports | $6.99 | one-time |
| All Productivity In-Apps | $9.99 | one-time |
| Craftsman Cost Books - NPH | $14.99 | one-time |
| Mac User Full License | $19.99 | one-time |


### 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, Vision Pro support

**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 Plumber Invoices & Estimates free?

Plumber Invoices & Estimates costs $7.99, and also offers in-app purchases.

### Is Backflow Pro free?

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

### Which has better reviews, Plumber Invoices & Estimates or Backflow Pro?

Backflow Pro is rated higher. Plumber Invoices & Estimates averages 3.6 out of 5 from 12 ratings, while Backflow Pro averages 5.0 from 1 ratings.

### Do Plumber Invoices & Estimates or Backflow Pro have ads?

Neither Plumber Invoices & Estimates nor Backflow Pro shows ads.

### Which is updated more often, Plumber Invoices & Estimates or Backflow Pro?

Plumber Invoices & Estimates ships an update every 3 months, and Backflow Pro every 3 weeks. Most recently, Plumber Invoices & Estimates was updated on November 6, 2026 and Backflow Pro on November 3, 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.*