# iNaturalist Classic vs Build

The clearest difference is ratings volume: iNaturalist Classic at 4.7K against Build's 3. iNaturalist Classic also leads on iOS requirement (12.0 vs 17.6). Build's advantage is update cadence (fortnightly vs every 5 weeks). On price, rating, ads 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.

On the App Store both sit at effectively the same score — 4.6 for iNaturalist Classic against 4.7 for Build. That said, the two scores are not equally well evidenced: iNaturalist Classic has 4.7K ratings behind it against 3, so its average is the more settled of the two.

iNaturalist Classic ships an update every 5 weeks, Build fortnightly. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iNaturalist Classic | Build |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (4.7K ratings)](https://appshunter.io/ios/app/inaturalist-classic/id421397028/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/build-a-math/id1521174530/reviews)** |
| Number of ratings | **4.7K** | 3 |
| Positive reviews | 81.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 44 MB | 1 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [iNaturalist](https://appshunter.io/developer/421397031) | [Weiran Ye](https://appshunter.io/developer/481592104) |

## What reviewers say

### iNaturalist Classic

[App page](https://appshunter.io/ios/app/inaturalist-classic/id421397028)

Record and identify species encounters with a simple interface. Contribute to scientific research and learn about biodiversity. Connect with other nature enthusiasts and explore the natural world.

**Highlights:** Identify species globally, Record species sightings, Contribute observations to science, Add observations to projects, Learn about biodiversity, Connect with nature enthusiasts

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

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for identifying plants, animals, and fungi
- 🤝 Supportive community of experts
- 🌱 Contributes to citizen science and research
- 🔍 Accurate identification suggestions
- 🌐 Works well globally

**What reviewers complain about**

- 🐛 Occasional crashes or bugs
- 🔍 Difficulty finding/sorting observations
- 🔒 Privacy concerns around data sharing
- 🤖 Concerns about AI/ML identification accuracy
- 💬 Negative interactions with some community members

**Reported bugs**

- Login issues or inability to create account
- Slow upload speeds or observation syncing
- Inconsistent performance between mobile and web versions

**Requested features**

- Ability to follow other users and see their observations
- More filtering and sorting options for observations
- Offline mode for taking photos and uploading later
- Easier location input for observations
- Private/personal project functionality


### Build

[App page](https://appshunter.io/ios/app/build-a-math/id1521174530)

This app offers short, focused math drills for addition, subtraction, multiplication, and division. It provides instant feedback and tracks progress through engaging sessions designed for quick practice.

**Highlights:** Short, focused math practice sessions, Master addition, subtraction, multiplication, division, Instant feedback with haptics, color, and sound, Smart question rotation for confidence, Progress tracking and summaries, Works offline, no ads, no accounts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iNaturalist Classic free?

iNaturalist Classic is free to download, with no in-app purchases.

### Is Build free?

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

### Which has better reviews, iNaturalist Classic or Build?

Build is rated higher. iNaturalist Classic averages 4.6 out of 5 from 4.7K ratings, while Build averages 4.7 from 3 ratings.

### Do iNaturalist Classic or Build have ads?

Neither iNaturalist Classic nor Build shows ads.

### Which is updated more often, iNaturalist Classic or Build?

iNaturalist Classic ships an update every 5 weeks, and Build fortnightly. Most recently, iNaturalist Classic was updated on October 28, 2026 and Build on October 24, 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.*