# Rules Measure vs Workshop Calc

The clearest difference is in-app purchases: Rules Measure at none against Workshop Calc's 1. Workshop Calc's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Workshop Calc sells 1 one-off in-app purchase. Rules Measure asks for nothing beyond the download.

Rules Measure ships an update every 9 days, Workshop Calc every 2 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Rules Measure | Workshop Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Size | 12 MB | 6 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Davis McDowell](https://appshunter.io/developer/1888685588) | [帆 胡](https://appshunter.io/developer/1699269059) |

## What reviewers say

### Rules Measure

[App page](https://appshunter.io/ios/app/rules-measure/id6761289085)

**In-app purchases:** none


### Workshop Calc

[App page](https://appshunter.io/ios/app/workshop-calc/id6782289595)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Workshop Calc Pro | $6.99 | one-time |


## Frequently asked questions

### Is Rules Measure free?

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

### Is Workshop Calc free?

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

### Do Rules Measure or Workshop Calc have ads?

Neither Rules Measure nor Workshop Calc shows ads.

### Which is updated more often, Rules Measure or Workshop Calc?

Rules Measure ships an update every 9 days, and Workshop Calc every 2 weeks. Most recently, Rules Measure was updated on November 9, 2026 and Workshop Calc on October 31, 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.*