# 银环蛇 vs CheckOnce

The clearest difference is in-app purchases: CheckOnce at none against 银环蛇's 4. 银环蛇's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price there is nothing between them.

Both are free to download. 银环蛇 sells 4 one-off in-app purchases. CheckOnce asks for nothing beyond the download.

银环蛇 ships an update every 3 weeks, CheckOnce every 3 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 银环蛇 | CheckOnce |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 55 MB | 8 MB |
| Requires iOS | **13** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Zamgu Network Technology Co.,Ltd.](https://appshunter.io/developer/1534597530) | [文睿 李](https://appshunter.io/developer/372593992) |

## What reviewers say

### 银环蛇

[App page](https://appshunter.io/ios/app/id6479283779)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Card (1 Month) | $2.99 | one-time |
| VIP Card (3 Months) | $4.99 | one-time |
| VIP Card (6 Months) | $7.99 | one-time |
| VIP Card (12 Months) | $14.99 | one-time |


### CheckOnce

[App page](https://appshunter.io/ios/app/checkonce-yes-or-no/id6757259451)

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

**In-app purchases:** none


## Frequently asked questions

### Is 银环蛇 free?

银环蛇 is free to download, with in-app purchases available.

### Is CheckOnce free?

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

### Do 银环蛇 or CheckOnce have ads?

CheckOnce shows ads; 银环蛇 does not.

### Which is updated more often, 银环蛇 or CheckOnce?

银环蛇 ships an update every 3 weeks, and CheckOnce every 3 months. Most recently, 银环蛇 was updated on October 25, 2026 and CheckOnce on October 24, 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.*