# Ruler∘ vs Bird Identifier

The clearest difference is in-app purchases: Ruler∘ at none against Bird Identifier's 4. Bird Identifier's advantage is rating (4.7 vs 4.4) and ratings volume (3K vs 44). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Bird Identifier sells 4 in-app purchases, starting at $7.99 per 7 days. Ruler∘ asks for nothing beyond the download.

Bird Identifier holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Bird Identifier has 3K ratings behind it against 44, so its average is the more settled of the two. Written reviews point the same way: 50% of Ruler∘'s written reviews are positive against 67% of Bird Identifier's.

Ruler∘ ships an update every 2 weeks, Bird Identifier weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Ruler∘ | Bird Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (44 ratings)](https://appshunter.io/ios/app/ruler/id1503532937/reviews) | **[4.7 (3K ratings)](https://appshunter.io/ios/app/bird-identifier-birdscope/id6743123395/reviews)** |
| Number of ratings | 44 | **3K** |
| Positive reviews | 50.0% of reviews | **67.2% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 88 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Andrei Shpileuski](https://appshunter.io/developer/1471178734) | [Scala technology limited](https://appshunter.io/developer/1838697365) |

## What reviewers say

### Ruler∘

[App page](https://appshunter.io/ios/app/ruler/id1503532937)

This app uses augmented reality to measure distances, lengths, heights, and angles with your device's camera. It offers various modes for accurate measurements on different surfaces and for small objects. Users can save their measurements directly to their camera roll.

**Highlights:** Augmented reality measurements, Measure distance, length, height, area, angles, Point and shoot measurement, Air Mode for linear measurement, Surface Locked for planes, Save measures to Camera Roll

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

**In-app purchases:** none


### Bird Identifier

[App page](https://appshunter.io/ios/app/bird-identifier-birdscope/id6743123395)

Instantly identify birds using photos or sound with advanced AI. Explore a comprehensive encyclopedia, access bird watching guides, and build your personal collection of identified species. Perfect for nature lovers and curious minds.

**Highlights:** AI-powered photo identification, Bird call and sound recognition, Extensive bird encyclopedia, Bird watching guides and tips, Personal bird collection, Fun avian stories

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bird identifier Pro weekly | $7.99 | per 7 days |
| Bird identifier Pro yearly | $39.99 | per year |
| Bird identifier yearly pro | $39.99 | per year |
| Bird identifier yearly pro | $39.99 | per year |

**What reviewers like**

- 👍 Addictive and enjoyable
- 🚀 Quick bird identification

**What reviewers complain about**

- 💰 Requires paid subscription
- 🐛 App crashes or doesn't load
- 🚫 False advertising about features

**Reported bugs**

- Blank white screen on launch
- Incorrect bird breed identification

**Requested features**

- Option to upload videos
- Improve accuracy of bird identification


## Frequently asked questions

### Is Ruler∘ free?

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

### Is Bird Identifier free?

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

### Which has better reviews, Ruler∘ or Bird Identifier?

Bird Identifier is rated higher. Ruler∘ averages 4.4 out of 5 from 44 ratings, while Bird Identifier averages 4.7 from 3K ratings.

### Do Ruler∘ or Bird Identifier have ads?

Neither Ruler∘ nor Bird Identifier shows ads.

### Which is updated more often, Ruler∘ or Bird Identifier?

Ruler∘ ships an update every 2 weeks, and Bird Identifier weekly. Most recently, Ruler∘ was updated on November 3, 2026 and Bird Identifier on November 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.*