# RulePad vs Caliper

The clearest difference is update cadence: Caliper at every 6 days against RulePad's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RulePad ships an update every 2 weeks, Caliper every 6 days. Both last shipped on October 13, 2026.

## The numbers

| Metric | RulePad | Caliper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Size | 3 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JUMING LAI](https://appshunter.io/developer/1886006893) | [UFUK OZDEMIR](https://appshunter.io/developer/1885204934) |

## What reviewers say

### RulePad

[App page](https://appshunter.io/ios/app/rulepad/id6762023547)

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

**In-app purchases:** none


### Caliper

[App page](https://appshunter.io/ios/app/caliper-level-ruler-and-angle/id6794116622)

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

**In-app purchases:** none


## Frequently asked questions

### Is RulePad free?

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

### Is Caliper free?

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

### Do RulePad or Caliper have ads?

Neither RulePad nor Caliper shows ads.

### Which is updated more often, RulePad or Caliper?

RulePad ships an update every 2 weeks, and Caliper every 6 days. Most recently, RulePad was updated on October 13, 2026 and Caliper on October 13, 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.*