# Ruler vs RoboDoc

The clearest difference is update cadence: RoboDoc at every 8 days against Ruler's monthly. Ruler's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Ruler sells 1 one-off in-app purchase and RoboDoc sells 1 in-app purchase, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Ruler ships an update monthly, RoboDoc every 8 days. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Ruler | RoboDoc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 8 days** |
| Size | 90 MB | 68 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [xita apps](https://appshunter.io/developer/1461041968) | [KOMERSOFT LLC](https://appshunter.io/developer/1555938096) |

## What reviewers say

### Ruler

[App page](https://appshunter.io/ios/app/ruler-measuring-tape/id1639869883)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove_Ads_Show_History | $4.99 | one-time |


### RoboDoc

[App page](https://appshunter.io/ios/app/robodoc/id6553989841)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | per month |


## Frequently asked questions

### Is Ruler free?

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

### Is RoboDoc free?

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

### Do Ruler or RoboDoc have ads?

Both Ruler and RoboDoc show ads.

### Which is updated more often, Ruler or RoboDoc?

Ruler ships an update monthly, and RoboDoc every 8 days. Most recently, Ruler was updated on October 23, 2026 and RoboDoc on October 22, 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.*