# iPool vs Ruler

The clearest difference is in-app purchases: iPool at none against Ruler's 3. iPool also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Ruler sells 3 in-app purchases, starting at $4.99 per 7 days. iPool asks for nothing beyond the download.

iPool ships an update every 4 weeks, Ruler every 6 weeks. The most recent releases landed on October 18, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | iPool | Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 26 MB | 10 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Puzzle Engineering](https://appshunter.io/developer/1532850383) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### iPool

[App page](https://appshunter.io/ios/app/ipool/id1532850381)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ruler

[App page](https://appshunter.io/ios/app/ruler-on-screen-tape-measure/id6772275569)

This app transforms your phone into a precise measuring tool. Calibrate it once with a common object to accurately measure small items, angles, and levels. It also includes a unit converter and a tape canvas for larger measurements.

**Highlights:** Calibrated on-screen ruler, Protractor with set square, Bubble level, Unit converter, Tape canvas for length and area, Saved history for measurements

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Angle & Protractor Weekly | $4.99 | per 7 days |
| Unit Converter Yearly | $24.99 | per year |
| Bubble Level Kit, Pay Once | $49.99 | one-time |


## Frequently asked questions

### Is iPool free?

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

### Is Ruler free?

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

### Do iPool or Ruler have ads?

Neither iPool nor Ruler shows ads.

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

iPool ships an update every 4 weeks, and Ruler every 6 weeks. Most recently, iPool was updated on October 18, 2026 and Ruler on October 20, 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.*