# Ruler App vs Tobi BLuE

The clearest difference is price: Tobi BLuE at Free against Ruler App's $0.99. Tobi BLuE also leads on update cadence (every 2 months vs every 11 months). Ruler App's advantage is iOS requirement (12.0 vs 16.6). On ads, in-app purchases and device support there is nothing between them.

Tobi BLuE is free to download; Ruler App costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ruler App ships an update every 11 months, Tobi BLuE every 2 months. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Ruler App | Tobi BLuE |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/ruler-app/id303731879/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 2 MB | 7 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Ferro Magnetics Corporation](https://appshunter.io/developer/1652363858) |

## What reviewers say

### Ruler App

[App page](https://appshunter.io/ios/app/ruler-app/id303731879)

Transform your iPhone or Apple Watch into a precise measuring tool. Easily switch between imperial and metric units and adjust the ruler's height for direct comparisons. Customize your experience with different color schemes.

**Highlights:** Imperial and metric scale switching, Adjustable ruler height, Color scheme customization, Apple Watch compatibility, Switchable ruler scales

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Tobi BLuE

[App page](https://appshunter.io/ios/app/tobi-blue/id6444109286)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ruler App free?

Ruler App costs $0.99, with no in-app purchases.

### Is Tobi BLuE free?

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

### Do Ruler App or Tobi BLuE have ads?

Neither Ruler App nor Tobi BLuE shows ads.

### Which is updated more often, Ruler App or Tobi BLuE?

Ruler App ships an update every 11 months, and Tobi BLuE every 2 months. Most recently, Ruler App was updated on October 22, 2026 and Tobi BLuE on October 25, 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.*