# Guitar Tuner vs Ruler®

The clearest difference is review sentiment: Guitar Tuner at 73% against Ruler®'s 22%. Guitar Tuner also leads on in-app purchases (none vs 2) and rating (4.6 vs 4.3). Ruler®'s advantage is ads (none vs shown) and update cadence (every 2 months vs every 9 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Ruler® sells 2 in-app purchases, starting at $1.99 per 7 days. Guitar Tuner asks for nothing beyond the download.

Guitar Tuner holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Ruler® has 35K ratings behind it against 3.9K, so its average is the more settled of the two. Written reviews point the same way: 73% of Guitar Tuner's written reviews are positive against 22% of Ruler®'s.

Guitar Tuner ships an update every 9 months, Ruler® every 2 months. Both last shipped on October 14, 2026.

## The numbers

| Metric | Guitar Tuner | Ruler® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (3.9K ratings)](https://appshunter.io/ios/app/guitar-tuner/id310457191/reviews)** | [4.3 (35K ratings)](https://appshunter.io/ios/app/ruler/id623207505/reviews) |
| Number of ratings | 3.9K | **35K** |
| Positive reviews | **73.0% of reviews** | 21.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 9 MB | 22 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alvin Yu](https://appshunter.io/developer/310457194) | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) |

## What reviewers say

### Guitar Tuner

[App page](https://appshunter.io/ios/app/guitar-tuner/id310457191)

Tune your 6-string guitar with precise reference notes. Supports standard tuning and more. Ensure your device is not on silent to hear the tuning tones.

**Highlights:** Accurate reference notes, Supports standard tuning (E A D G B e), Supports more tunings, Clear tuning tones, Device not on silent required

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Guitar Tuner free?

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

### Is Ruler® free?

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

### Which has better reviews, Guitar Tuner or Ruler®?

Guitar Tuner is rated higher. Guitar Tuner averages 4.6 out of 5 from 3.9K ratings, while Ruler® averages 4.3 from 35K ratings.

### Do Guitar Tuner or Ruler® have ads?

Guitar Tuner shows ads; Ruler® does not.

### Which is updated more often, Guitar Tuner or Ruler®?

Guitar Tuner ships an update every 9 months, and Ruler® every 2 months. Most recently, Guitar Tuner was updated on October 14, 2026 and Ruler® on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*