# Ruler® vs Temopi Keep

The clearest difference is price: Ruler® at Free against Temopi Keep's $1.99. Temopi Keep's advantage is in-app purchases (none vs 2) and update cadence (every 4 days vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

Ruler® is free to download; Temopi Keep costs $1.99 up front. Ruler® sells 2 in-app purchases, starting at $1.99 per 7 days. Temopi Keep asks for nothing beyond the download.

Ruler® ships an update every 2 months, Temopi Keep every 4 days. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Ruler® | Temopi Keep |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.3 (35K ratings)](https://appshunter.io/ios/app/ruler/id623207505/reviews)** | — |
| Number of ratings | **35K** | — |
| Positive reviews | 21.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 73 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [Vincent Tu](https://appshunter.io/developer/1279151846) |

## What reviewers say

### Ruler®

[App page](https://appshunter.io/ios/app/ruler/id623207505)

This app provides a versatile toolkit for all your measurement needs. It includes a classic ruler, a tape measure, and a camera ruler for precise measurements. Easily switch between units and document your findings by adding measurements directly to photos.

**Highlights:** Classic ruler and tape measure, Camera ruler mode, Photo measures mode, Dual unit support (inches/cm), Precision sliders for small objects, Elegant and user-friendly interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler Pro (Weekly) | $1.99 | per 7 days |
| Pro Features | $1.99 | one-time |

**What reviewers like**

- 🚀 Accurate measurements
- 👍 Easy to use
- 🔍 Convenient for small items
- 📏 Useful ruler tool

**What reviewers complain about**

- 💰 Paywall for basic features
- ⏱️ Limited free usage time
- 🔍 Inaccurate for larger objects
- 🙅‍♀️ Aggressive monetization tactics

**Reported bugs**

- Inconsistent measurements
- Compatibility issues with newer devices

**Requested features**

- Ability to switch between metric and imperial units without paying
- Improved accuracy for larger measurements
- Removal of time limits on free usage


### Temopi Keep

[App page](https://appshunter.io/ios/app/temopi-keep/id6753092570)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ruler® free?

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

### Is Temopi Keep free?

Temopi Keep costs $1.99, with no in-app purchases.

### Do Ruler® or Temopi Keep have ads?

Neither Ruler® nor Temopi Keep shows ads.

### Which is updated more often, Ruler® or Temopi Keep?

Ruler® ships an update every 2 months, and Temopi Keep every 4 days. Most recently, Ruler® was updated on October 12, 2026 and Temopi Keep on October 5, 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.*