Colony B vs Eterna
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Colony B
Contribute to scientific research by collecting and growing microbes in a fast-paced puzzle game. Unlock badges to learn about microorganisms and help analyze data for a citizen science project.
- Collect and grow microbes
- Fast-paced puzzle gameplay
- Unlock learning badges
- Contribute to scientific research
- Citizen science participation
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Unravel the secrets of microscopic life! Colony B is a mobile game developed at McGill University that allows you to contribute to research on microbes. Collect microbes and grow your colony in a fast paced puzzle game. Unlock badges to learn about microbes living inside our body. The results are used to analyze data from the American Gut project based at University of California San Diego. Play Colony B and become a citizen scientist!
Eterna
Engage in a citizen science game to design RNA molecules for medical research. Solve puzzles to unlock lab access and contribute to inventing new medicines through challenges.
- Design RNA molecules
- Solve scientific puzzles
- Participate in medical research
- Invent new medicines
- Unlock lab access
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Eterna is a citizen science game where players learn to design RNA molecules for medical research by solving puzzles. Complete introductory puzzles to unlock lab access and participate in challenges where you can invent medicine!
Screenshots
Verdict
The clearest difference is rating: Eterna at 3.7 against Colony B's 2.4. Eterna also leads on review sentiment (33% vs 25%). Colony B's advantage is iOS requirement (7.0 vs 13.0). On price, ratings volume, update cadence and ads 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.
Eterna holds the better App Store score, 3.7 against 2.4. Both are backed by a comparable volume of ratings — 8 and 15 respectively. Written reviews point the same way: 25% of Colony B's written reviews are positive against 33% of Eterna's.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.
| Parameter | Colony B | Eterna |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (8 ratings) | 3.7 (15 ratings) — better |
| Positive reviews | 25.0% of reviews | 33.3% of reviews — better |
| Number of ratings | 8 | 15 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 7.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 140 MB | 188 MB |
| Age rating | 4+ | 12+ |
| Developer | Diga Design | Vital Mind Media |
Customer experience
Colony B
Eterna
In-app purchases
Colony B
No in-app purchases
Eterna
No in-app purchases
