FrogID vs Spot Rust
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FrogID
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.
- Record frog calls
- Identify frog species
- Citizen science project
- Submit records for verification
- Track frog populations
- Monitor waterway health
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FrogID is Australia’s first national citizen science frog identification initiative – a project led by the Australian Museum in partnership with Australia’s leading natural history museums and IBM. Use the App to create a profile, record frog calls and match your calls to the frog calls on the app. Then upload your records to the Australian Museum frog experts for species verification. With your help we can put more frog species on the map and track changes to their species and habitats over time, and therefore monitor our waterway's health.
Spot Rust
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Do you love rust? Or maybe corrosion is your nemesis? SpotRust uses deep learning AI on your iPhone to detect rusty things - specifically ferrous corrosion. Use your own photos you've taken over the years of rust, take a picture of something being eaten away by salt, or use live mode to explore the oxidation around you. SpotRust is a work in progress, and you can help to improve its detection by submitting your photos to our dataset.
Screenshots
Verdict
The clearest difference is iOS requirement: FrogID at 13.0 against Spot Rust's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 13, 2026 and September 29, 2026 respectively.
| Parameter | FrogID | Spot Rust |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (18 ratings) — better | — |
| Positive reviews | 52.1% of reviews | — |
| Number of ratings | 18 — better | — |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 96 MB | 262 MB |
| Age rating | 4+ | 4+ |
| Developer | Australian Museum | William T Nash |
Bugs and requests
FrogID
Reported bugs
43 issues- App crashes constantly
- Database updating hangs
- Recording issues (cutting out, no results)
- App freezes
- App logs off frequently
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- Photo upload fails or disappears
- Password issues
- Cannot record with Bluetooth
- App crashes on opening/explore screen
- Lost recordings
- App not loading
- Microphone not working
- Notes section behind keyboard
- Submit icon frozen
- Null frogs error
- App closes itself
- Cannot submit recordings
- App crashes when accessing Profile
- Recording page issues
- Cannot send recordings
- Submit status 'not submitted'
- App crashes frequently
- No way to match new frogs
- App closes down when accessing Profile
- Cannot record without audio
- App hangs and hangs
- Verification is very slow
- App is deaf unless frog is close
- Assumptions on species based on habitat
- Upload doesn't work
- No way to know if recording submitted
- Frustrating bugs
- No feedback on submissions
- App keeps logging off
- Photos too small
- Cannot identify rare species
- App is useless if not working
- No expert or community verification
- Primitive app, needs work
- Limited to Australia
- Long wait for confirmation
- No photo search
- Discouraging lack of feedback
Requested features
12 requests- 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
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- Show user status (e.g., Tadpole)
- Add a stats page showing population changes
- Allow uploading audio from video/audio clips
- Option to upload photo for identification
- Filter based on location
- Add dark mode
- Add advanced analytics dashboard
Spot Rust
Not enough reviews yet to summarise bugs or requests.
In-app purchases
FrogID
No in-app purchases
Spot Rust
No in-app purchases
