# 三双 vs SciReady

三双 and SciReady are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. 三双 sells 3 in-app purchases, starting at $3.99 per month and SciReady sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 三双 | SciReady |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 34 MB | 16 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 9+ | 4+ |
| Developer | [Xi'an Mengdong Network Technology Co., Ltd.](https://appshunter.io/developer/1687598458) | [开鑫 温](https://appshunter.io/developer/6808446783) |

## What reviewers say

### 三双

[App page](https://appshunter.io/ios/app/id6740458396)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月会员 | $3.99 | per month |
| 连续包年会员 | $24.99 | per year |
| 永久会员 | $9.99 | one-time |


### SciReady

[App page](https://appshunter.io/ios/app/sciready/id6809805951)

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SciReady Monthly | $0.99 | per month |
| SciReady Yearly | $14.99 | per year |
| SciReady One Month | $1.99 | one-time |
| SciReady Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is 三双 free?

三双 is free to download, with in-app purchases available.

### Is SciReady free?

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

### Do 三双 or SciReady have ads?

Neither 三双 nor SciReady shows ads.

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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.*