# Audubon Bird Guide vs Metric Conversion tool

The clearest difference is rating: Metric Conversion tool at 4.8 against Audubon Bird Guide's 4.3. Metric Conversion tool also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Audubon Bird Guide's advantage is chart position (#202 vs unranked). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Metric Conversion tool holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 4.5K and 15K respectively. Written reviews point the same way: 64% of Audubon Bird Guide's written reviews are positive against 70% of Metric Conversion tool's.

Audubon Bird Guide ships an update every 3 weeks, Metric Conversion tool every 10 days. The most recent releases landed on September 26, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Audubon Bird Guide | Metric Conversion tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (4.5K ratings)](https://appshunter.io/ios/app/audubon-bird-guide/id333227386/reviews) | **[4.8 (15K ratings)](https://appshunter.io/ios/app/metric-conversion-tool/id1439430070/reviews)** |
| Number of ratings | 4.5K | **15K** |
| Positive reviews | 64.3% of reviews | **70.2% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#202** | — |
| Size | 358 MB | 22 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [National Audubon Society](https://appshunter.io/developer/1007642225) | [Wight Hat](https://appshunter.io/developer/1425885740) |

## What reviewers say

### Audubon Bird Guide

[App page](https://appshunter.io/ios/app/audubon-bird-guide/id333227386)

**Currently charting:** #202 Top Free · Reference (US App Store)

Identify North American birds with this comprehensive field guide. Features include a bird ID tool based on observations, detailed species information with photos and audio, and a personal sightings log. Discover nearby birding locations and connect with conservation efforts.

**Highlights:** Bird identification tool, Detailed species profiles, Bird song and call audio, Sightings log and life list, Nearby birding hotspots, Photo sharing

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app
- 👍 Easy to use
- 🔍 Helpful for identifying birds
- 🎶 Useful bird calls and sounds
- 📍 Provides location-based bird sightings

**What reviewers complain about**

- 🐛 Buggy and crashes
- 🔄 Confusing interface changes
- 🔒 Requires account creation
- 📍 Limited location-based features
- 🗺️ Outdated or incomplete range maps

**Reported bugs**

- Crashes when opening settings
- Incorrect sighting location recording
- Unreliable login and account features
- Compatibility issues with newer devices
- Syncing and data loss problems

**Requested features**

- Add photo ID and sound ID features
- Improve location-based bird sightings
- Expand coverage to more regions/countries
- Allow offline access to field guide
- Provide more detailed bird information


### Metric Conversion tool

[App page](https://appshunter.io/ios/app/metric-conversion-tool/id1439430070)

This app provides a comprehensive unit and currency converter with a user-friendly interface. It offers offline functionality, supports over 30,000 unit conversions, and includes more than 160 currencies with live exchange rates. Users can save favorite conversions and get precise results.

**Highlights:** Offline functionality, Over 30,000 unit conversions, 160+ currencies with live rates, Save favorite conversions, Answers in fractions, Up to 5 decimal places

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

**In-app purchases:** none

**What reviewers like**

- 💡 Useful conversion tool
- 👍 Easy to use and navigate
- 🚀 Quick and efficient
- 👍 Comprehensive coverage of conversions

**What reviewers complain about**

- 🔊 Intrusive and loud ads
- 🔒 Questionable privacy practices
- 🐛 Inaccurate conversions
- 👎 Disruptive to workflow

**Reported bugs**

- Temperature conversion displaying incorrect values
- Ads triggering false memory full warnings

**Requested features**

- Paid version to remove ads
- Option to display results in preferred format
- Speed conversion (mph, km/h, etc.)


## Frequently asked questions

### Is Audubon Bird Guide free?

Audubon Bird Guide is free to download, with no in-app purchases.

### Is Metric Conversion tool free?

Metric Conversion tool is free to download, with no in-app purchases.

### Which has better reviews, Audubon Bird Guide or Metric Conversion tool?

Metric Conversion tool is rated higher. Audubon Bird Guide averages 4.3 out of 5 from 4.5K ratings, while Metric Conversion tool averages 4.8 from 15K ratings.

### Do Audubon Bird Guide or Metric Conversion tool have ads?

Audubon Bird Guide shows ads; Metric Conversion tool does not.

### Which is updated more often, Audubon Bird Guide or Metric Conversion tool?

Audubon Bird Guide ships an update every 3 weeks, and Metric Conversion tool every 10 days. Most recently, Audubon Bird Guide was updated on September 26, 2026 and Metric Conversion tool on September 27, 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.*