# 水神 vs 1A1M

The clearest difference is update cadence: 水神 at every 2 months against 1A1M's every 4 months. 1A1M's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

水神 ships an update every 2 months, 1A1M every 4 months. The most recent releases landed on September 17, 2026 and May 19, 2026 respectively.

## The numbers

| Metric | 水神 | 1A1M |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 12 MB | 71 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Komatsuelectric Industry Co.,Ltd.](https://appshunter.io/developer/486645023) | [IDEC CORPORATION](https://appshunter.io/developer/609407337) |

## What reviewers say

### 水神

[App page](https://appshunter.io/ios/app/id486645020)

**Features:** macOS Compatibility

**In-app purchases:** none


### 1A1M

[App page](https://appshunter.io/ios/app/1a1m/id6461311298)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 水神 free?

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

### Is 1A1M free?

1A1M is free to download, with no in-app purchases.

### Do 水神 or 1A1M have ads?

Neither 水神 nor 1A1M shows ads.

### Which is updated more often, 水神 or 1A1M?

水神 ships an update every 2 months, and 1A1M every 4 months. Most recently, 水神 was updated on September 17, 2026 and 1A1M on May 19, 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.*