# iSpecimen标本伴侣 vs Viki AI

The clearest difference is in-app purchases: iSpecimen标本伴侣 at none against Viki AI's 15. iSpecimen标本伴侣 also leads on iOS requirement (8.0 vs 15.6). Viki AI's advantage is update cadence (fortnightly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Viki AI sells 15 one-off in-app purchases. iSpecimen标本伴侣 asks for nothing beyond the download.

iSpecimen标本伴侣 ships an update every 3 months, Viki AI fortnightly. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | iSpecimen标本伴侣 | Viki AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 25 MB | 57 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Institute of Botany, the Chinese Academy of Sciences](https://appshunter.io/developer/1442416435) | [Changsha Nuoyazu Technology Co., Ltd](https://appshunter.io/developer/1803293531) |

## What reviewers say

### iSpecimen标本伴侣

[App page](https://appshunter.io/ios/app/ispecimen/id1460357623)

**Features:** macOS Compatibility

**In-app purchases:** none


### Viki AI

[App page](https://appshunter.io/ios/app/viki-ai/id6743520861)

**Features:** macOS Compatibility

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 70 minutes of translation time | $9.99 | one-time |
| 150 minutes for translation | $19.99 | one-time |
| 月卡-VIP-中国大陆 | $39.99 | one-time |
| 月卡-VIP | $39.99 | one-time |
| 400 minutes of translation | $49.99 | one-time |
| 月卡-SVIP-中国大陆 | $69.99 | one-time |
| 月卡-SVIP | $69.99 | one-time |
| half-year VIP card | $199.00 | one-time |
| 半年卡-VIP-中国大陆 | $199.99 | one-time |
| annual VIP card | $299.00 | one-time |
| Half-year SVIP card | $299.00 | one-time |
| 年卡-VIP-中国大陆 | $299.99 | one-time |
| 半年卡-SVIP-中国大陆 | $299.99 | one-time |
| annual SVIP card | $499.00 | one-time |
| 年卡-SVIP-中国大陆 | $499.99 | one-time |


## Frequently asked questions

### Is iSpecimen标本伴侣 free?

iSpecimen标本伴侣 is free to download, with no in-app purchases.

### Is Viki AI free?

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

### Do iSpecimen标本伴侣 or Viki AI have ads?

Neither iSpecimen标本伴侣 nor Viki AI shows ads.

### Which is updated more often, iSpecimen标本伴侣 or Viki AI?

iSpecimen标本伴侣 ships an update every 3 months, and Viki AI fortnightly. Most recently, iSpecimen标本伴侣 was updated on October 7, 2026 and Viki AI on October 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.*