# Krill Keeper vs Stockout Zero

The clearest difference is price: Krill Keeper at Free against Stockout Zero's $0.29. Krill Keeper also leads on iOS requirement (16.0 vs 18.0). Stockout Zero's advantage is ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

Krill Keeper is free to download; Stockout Zero costs $0.29 up front. Neither carries in-app purchases, so what you see is what you pay.

Krill Keeper ships an update every 9 days, Stockout Zero weekly. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Krill Keeper | Stockout Zero |
| --- | --- | --- |
| Price | **Free** | $0.29 |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/krill-keeper/id6759456112/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 68 MB | 24 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nante Studio](https://appshunter.io/developer/1700809099) | [Makoto Fukuoka](https://appshunter.io/developer/1817908735) |

## What reviewers say

### Krill Keeper

[App page](https://appshunter.io/ios/app/krill-keeper/id6759456112)

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.

**Highlights:** Realistic krill swarm simulation, Feed and clean krill, Hatch new krill companions, Collect 20 krill variants, Discover rare variants, Deep-sea dark palette visuals

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Stockout Zero

[App page](https://appshunter.io/ios/app/stockout-zero/id6768219693)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Krill Keeper free?

Krill Keeper is free to download, with no in-app purchases.

### Is Stockout Zero free?

Stockout Zero costs $0.29, with no in-app purchases.

### Do Krill Keeper or Stockout Zero have ads?

Krill Keeper shows ads; Stockout Zero does not.

### Which is updated more often, Krill Keeper or Stockout Zero?

Krill Keeper ships an update every 9 days, and Stockout Zero weekly. Most recently, Krill Keeper was updated on October 7, 2026 and Stockout Zero on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*