# FrogID vs Grindstone

The clearest difference is iOS requirement: FrogID at 13.0 against Grindstone's 18.6. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | FrogID | Grindstone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (18 ratings)](https://appshunter.io/ios/app/frogid/id1176329797/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 52.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free | — |
| Size | 96 MB | 1 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Australian Museum](https://appshunter.io/developer/458262919) | [MARGAUX SJAAN HAYES](https://appshunter.io/developer/6809380462) |

## What reviewers say

### FrogID

[App page](https://appshunter.io/ios/app/frogid/id1176329797)

This app allows users to identify Australian frog species by recording their calls. It contributes to a national citizen science initiative, helping experts track frog populations and monitor waterway health.

**Highlights:** Record frog calls, Identify frog species, Citizen science project, Submit records for verification, Track frog populations, Monitor waterway health

**In-app purchases:** none

**What reviewers like**

- 👍 Great for learning frog calls
- 💡 Citizen science contribution
- 🤩 Fun for kids and adults
- 🗺️ Helps identify frogs in area
- ✅ Accurate matching results (for some)

**What reviewers complain about**

- 😞 Limited to Australia
- 🐌 Long wait for confirmation
- 🤷🏼 No photo search
- 😔 Discouraging lack of feedback
- 👎 Useless if not working

**Reported bugs**

- App crashes constantly
- Database updating hangs
- Recording issues (cutting out, no results)
- App freezes
- App logs off frequently

**Requested features**

- Add photo search functionality
- Include other countries (e.g., US, Minnesota)
- Allow photo submission without audio
- Add a short list function
- Add a call playlist function


### Grindstone

[App page](https://appshunter.io/ios/app/grindstone/id6809380460)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FrogID free?

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

### Is Grindstone free?

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

### Do FrogID or Grindstone have ads?

Neither FrogID nor Grindstone shows ads.

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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.*