# Backflow Buddy vs Living Stone Kirk

The clearest difference is price: Living Stone Kirk at Free against Backflow Buddy's $1.99. Living Stone Kirk also leads on ads (none vs shown). Backflow Buddy's advantage is update cadence (fortnightly vs every 5 months) and iOS requirement (12.0 vs 15.1). On in-app purchases and device support there is nothing between them.

Living Stone Kirk is free to download; Backflow Buddy costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Backflow Buddy ships an update fortnightly, Living Stone Kirk every 5 months. The most recent releases landed on November 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Backflow Buddy | Living Stone Kirk |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/backflow-buddy/id6475203858/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 5 months |
| Monetization | Paid | — |
| Size | 258 MB | 53 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Greg Phillips](https://appshunter.io/developer/1723623593) | [Living Stone Reformed Church](https://appshunter.io/developer/1825021898) |

## What reviewers say

### Backflow Buddy

[App page](https://appshunter.io/ios/app/backflow-buddy/id6475203858)

This app simulates backflow prevention devices and their testing procedures. It offers customizable water pressure simulations and quizzes to prepare users for certification exams.

**Highlights:** RPZ and Test Gauge simulation, Double Check and Test Gauge simulation, Customizable internal water pressure, Differential pressure gauge simulation, Quiz preparation with multiple lengths, Randomized industry-expert questions, Comprehensive quiz results

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

**In-app purchases:** none


### Living Stone Kirk

[App page](https://appshunter.io/ios/app/living-stone-kirk/id6748288788)

**In-app purchases:** none


## Frequently asked questions

### Is Backflow Buddy free?

Backflow Buddy costs $1.99, with no in-app purchases.

### Is Living Stone Kirk free?

Living Stone Kirk is free to download, with no in-app purchases.

### Do Backflow Buddy or Living Stone Kirk have ads?

Backflow Buddy shows ads; Living Stone Kirk does not.

### Which is updated more often, Backflow Buddy or Living Stone Kirk?

Backflow Buddy ships an update fortnightly, and Living Stone Kirk every 5 months. Most recently, Backflow Buddy was updated on November 8, 2026 and Living Stone Kirk on October 25, 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.*