iMammalia vs Ring Sizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iMammalia
Record wild mammal sightings across Europe with this app. Submit your observations, with or without photos, for expert verification and contribute to mammal distribution mapping. All records can be managed and updated online.
- Record mammal sightings
- Photo uploads optional
- Expert verification of records
- Contribute to distribution mapping
- Online record management
- Supports European countries
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The iMammalia App is designed to encourage recording of mammals in the wild. This version of the mobile application is set up to easily record mammals in any European country, but does not yet have all European languages included. Sightings can be recorded anywhere, with or without photos, and all records will be verified by experts and made available to help with mapping the distribution of European mammals. You can check and update your records online.
Ring Sizer
Easily determine your ring size using your finger or an existing ring. Supports various international sizing systems to help you avoid ordering the wrong size. Measurement results are recommendations and should be verified before purchase.
- Measure finger size
- Measure existing ring size
- Supports international sizing systems (EU, US, UK)
- Quick and simple to use
- Reduces ordering wrong ring sizes
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- Find your ring size from a finger or an existing ring - Supports multiple international size systems (EU, US, UK and more) - Quick and simple to use - Helps reduce ordering the wrong ring size - Measurement results are recommendations. Please verify final size before purchase Subscription required: A paid auto-renewable subscription is required to access all features. Terms of Use (EULA): https://ringsizer.wotaso.com/terms?locale=en-us
Screenshots
Verdict
The clearest difference is rating: iMammalia at 5.0 against Ring Sizer's 2.0. iMammalia also leads on in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 3 months). On price, ratings volume, ads and device support 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. Ring Sizer sells 2 in-app purchases, starting at $9.99 per 7 days. iMammalia asks for nothing beyond the download.
iMammalia holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
iMammalia ships an update every 3 weeks, Ring Sizer every 3 months. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | iMammalia | Ring Sizer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 2.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 51 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Centre for Ecology and Hydrology | Wotaso GmbH |
Customer experience
iMammalia
Ring Sizer
In-app purchases
iMammalia
No in-app purchases
Ring Sizer
- Ring Sizer Pro Weekly$9.997 Days
- Ring Sizer Pro Lifetime$19.99
