# Ruler App vs Battery Genie Debug

The clearest difference is price: Battery Genie Debug at Free against Ruler App's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Battery Genie Debug is free to download; Ruler App costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ruler App ships an update every 11 months, Battery Genie Debug every 13 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Ruler App | Battery Genie Debug |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/ruler-app/id303731879/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 months** | Every 13 months |
| Monetization | Paid | — |
| Size | 2 MB | 32 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [RPS Battery Co.,Ltd](https://appshunter.io/developer/1645812484) |

## What reviewers say

### Ruler App

[App page](https://appshunter.io/ios/app/ruler-app/id303731879)

Transform your iPhone or Apple Watch into a precise measuring tool. Easily switch between imperial and metric units and adjust the ruler's height for direct comparisons. Customize your experience with different color schemes.

**Highlights:** Imperial and metric scale switching, Adjustable ruler height, Color scheme customization, Apple Watch compatibility, Switchable ruler scales

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Battery Genie Debug

[App page](https://appshunter.io/ios/app/battery-genie-debug/id6496861018)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ruler App free?

Ruler App costs $0.99, with no in-app purchases.

### Is Battery Genie Debug free?

Battery Genie Debug is free to download, with no in-app purchases.

### Do Ruler App or Battery Genie Debug have ads?

Neither Ruler App nor Battery Genie Debug shows ads.

### Which is updated more often, Ruler App or Battery Genie Debug?

Ruler App ships an update every 11 months, and Battery Genie Debug every 13 months. Most recently, Ruler App was updated on November 2, 2026 and Battery Genie Debug on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*