Krill Keeper vs Choposo
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Krill Keeper
A relaxing simulation game where you nurture a deep-sea krill colony. Feed and clean your krill, hatch eggs to expand your colony, and discover 20 unique variants. Enjoy peaceful gameplay with realistic flocking physics and beautiful dark visuals.
- Realistic krill swarm simulation
- Feed and clean krill
- Hatch new krill companions
- Collect 20 krill variants
- Discover rare variants
- Deep-sea dark palette visuals
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Krill Keeper is a relaxing simulation game where you care for krill in a deep-sea tank. Feed your krill, keep the tank clean, and hatch eggs to welcome new companions. Watch them swim together in realistic flocking patterns powered by boid physics, and collect 6 unique krill variants. Key Features: - Realistic krill swarm simulation with boid flocking physics - Feed and clean to keep your krill happy and healthy - Hatch eggs to recruit new krill companions - Collect 6 krill variants across 4 rarity tiers - Discover rare variants through milestones and random drops - Beautiful deep-sea dark palette visuals Take a break and find peace with the tiny creatures of the deep sea.
Choposo
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A tiny creature that lives on your Lock Screen. Choposo is a pet-raising app that lives on your iPhone's Lock Screen and Dynamic Island. Every time you glance at your phone, a small creature is walking around. ■ Care for it right from the Lock Screen Feed and clean up without opening the app. On supported devices, it walks around inside the Dynamic Island. ■ The bed decides who hatches There are 52 beds. Which one you place determines what hatches from the egg. A donut bed, a tree stump, a seashell. ■ Food shapes how it grows The same creature grows differently depending on what it eats. Feed it the food tied to its bed, or stick to the basics — each lineage has three possible adults. ■ Five days, one lifetime Egg, juvenile, adult, then old age and a new egg. One generation takes about five days. Every creature you've said goodbye to stays in your album. ■ Visit your friends' nests Trade friend codes and drop by their room. Visiting exchanges a souvenir food. Your creature appears on their Lock Screen for one hour. ■ A world made of paper Every image is made from construction paper, crayon, and craft. 209 creatures, 52 beds, 100 pieces of furniture, 30 backgrounds. And one bed that only five people in the world will own.
Screenshots
Verdict
The clearest difference is in-app purchases: Krill Keeper at none against Choposo's 6. Choposo's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 weeks). On price, device support and iOS requirement 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. Choposo sells 6 one-off in-app purchases. Krill Keeper asks for nothing beyond the download.
Krill Keeper ships an update every 2 weeks, Choposo every 4 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | Krill Keeper | Choposo |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) — better | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 2 weeks | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 102 MB | 484 MB |
| Age rating | 4+ | 4+ |
| Developer | Nante Studio | Tsuyoshi Hashimoto |
In-app purchases
Krill Keeper
No in-app purchases
Choposo
- 150 Gems$3.99
- 220 Gems$4.99
- 500 Gems$9.99
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- 1500 Gems$29.99
- 2500 Gems$39.99
- 5500 Gems$79.99









