BioDex vs Flaggle.io
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BioDex
This app aids natural history collection workers and taxonomists in sorting and archiving museum specimens. It identifies species by comparing specimen photos to a database, initially focusing on butterflies.
- Specimen identification
- Species comparison
- Museum specimen archiving
- Butterfly identification
- Ergonomic layout
- Active development
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Made to assist Taxonomists and workers in natural history collections, BioDex aims to empower people who want to contribute to the process of sorting and archiving museum specimens. After photographing a specimen, the app displays a list of the most similar species along with example images for cross reference. We are currently focused on identifying species of Butterflies but are working adding more families of Lepidoptera and other Insect groups in the future. HIGHLIGHTS - specifically designed use in collections - fast identification results - ergonomic layout for repeated use - active development to add new species and taxonomic groups ABOUT Developed by ETH Library Lab and ETH Entomological Collection. Native App developed by Propulsion Academy Zurich https://www.librarylab.ethz.ch/ https://usys.ethz.ch/en/research/collections/entomological-collection.html
Flaggle.io
Test your knowledge of national and territorial flags. Identify a mystery flag with limited guesses, using color comparisons to narrow down possibilities. Study your history to improve recognition skills.
- Identify flags of UN member states and other territories
- Visual color comparisons after each guess
- Searchable country and flag list
- Focused gameplay
- No accounts, ads, or tracking
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Think you know flags? Flaggle challenges you to identify a mystery flag in as few guesses as possible. After each incorrect guess, your flag is compared with the answer, revealing where their colors match. Study your guess history to narrow down the possibilities and identify it. Features: • Flags of all 195 UN member and observer states • Flags of 60 other territories and nations • Visual color comparisons after every guess • Searchable country selection and flag list • Simple, focused gameplay • No accounts, advertisements, or tracking Whether you’re a vexillology veteran or just starting to learn, Flaggle is a great way to test your knowledge and sharpen your recognition skills. Good luck and have fun!
Screenshots
Verdict
The clearest difference is rating: Flaggle.io at 4.0 against BioDex's 3.0. Flaggle.io also leads on ratings volume (4 vs 1). BioDex's advantage is iOS requirement (10.0 vs 15.1). On price, ads, in-app purchases and monetization model 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.
Flaggle.io holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
| Parameter | BioDex | Flaggle.io |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) | 4.0 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 4 — better |
| Update frequency | — | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 88 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | ETH Zurich | Joshua Velazquez |
Customer experience
BioDex
Flaggle.io
In-app purchases
BioDex
No in-app purchases
Flaggle.io
No in-app purchases









