# Super Ruler vs Kaliper

The clearest difference is in-app purchases: Super Ruler at none against Kaliper's 1. Super Ruler also leads on iOS requirement (11.0 vs 14.0). Kaliper's advantage is update cadence (every 8 months vs every 109 months). On price, ads and device support there is nothing between them.

Both are free to download. Kaliper sells 1 one-off in-app purchase. Super Ruler asks for nothing beyond the download.

Super Ruler ships an update every 109 months, Kaliper every 8 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Super Ruler | Kaliper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (8 ratings)](https://appshunter.io/ios/app/kaliper/id1469528726/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 109 months | **Every 8 months** |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 4 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hany Elmehy](https://appshunter.io/developer/959484887) | [Farren Domenici](https://appshunter.io/developer/583666476) |

## What reviewers say

### Super Ruler

[App page](https://appshunter.io/ios/app/super-ruler/id1182697242)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kaliper

[App page](https://appshunter.io/ios/app/kaliper/id1469528726)

Measure key cuts accurately using your device's camera. This utility helps decode keys when a physical caliper is unavailable or difficult to read. Offers predefined systems and custom measurement options for various lock types.

**Highlights:** Measure key cuts with device camera, Predefined lock systems, Custom key measurement input, Ad-free upgrade option, Supports various lock brands

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kaliper Full Version | $1.99 | one-time |


## Frequently asked questions

### Is Super Ruler free?

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

### Is Kaliper free?

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

### Do Super Ruler or Kaliper have ads?

Both Super Ruler and Kaliper show ads.

### Which is updated more often, Super Ruler or Kaliper?

Super Ruler ships an update every 109 months, and Kaliper every 8 months. Most recently, Super Ruler was updated on October 26, 2026 and Kaliper on October 24, 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.*