# ZeRo結螺 vs Daphnia

The clearest difference is price: ZeRo結螺 at Free against Daphnia's $3.99. Daphnia's advantage is in-app purchases (none vs 2) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

ZeRo結螺 is free to download; Daphnia costs $3.99 up front. ZeRo結螺 sells 2 one-off in-app purchases. Daphnia asks for nothing beyond the download.

ZeRo結螺 ships an update every 3 days, Daphnia every 5 days. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | ZeRo結螺 | Daphnia |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 5 days |
| Size | 124 MB | 4 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [GUOMING YAN](https://appshunter.io/developer/1818313860) | [HOBEEC](https://appshunter.io/developer/465035845) |

## What reviewers say

### ZeRo結螺

[App page](https://appshunter.io/ios/app/zero/id6766207474)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解鎖 3 個陀螺格子 | $0.99 | one-time |
| 解鎖 12 個陀螺格子 | $2.99 | one-time |


### Daphnia

[App page](https://appshunter.io/ios/app/daphnia-ecosystem-simulator/id6795031582)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is ZeRo結螺 free?

ZeRo結螺 is free to download, with in-app purchases available.

### Is Daphnia free?

Daphnia costs $3.99, with no in-app purchases.

### Do ZeRo結螺 or Daphnia have ads?

ZeRo結螺 shows ads; Daphnia does not.

### Which is updated more often, ZeRo結螺 or Daphnia?

ZeRo結螺 ships an update every 3 days, and Daphnia every 5 days. Most recently, ZeRo結螺 was updated on October 5, 2026 and Daphnia on September 30, 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.*