# KD App vs Viki AI

The clearest difference is in-app purchases: KD App at none against Viki AI's 15. KD App also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Viki AI sells 15 one-off in-app purchases. KD App asks for nothing beyond the download.

KD App ships an update monthly, Viki AI fortnightly. The most recent releases landed on October 18, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | KD App | Viki AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Size | 49 MB | 57 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [深圳市金大智能创新科技有限公司](https://appshunter.io/developer/1700863606) | [Changsha Nuoyazu Technology Co., Ltd](https://appshunter.io/developer/1803293531) |

## What reviewers say

### KD App

[App page](https://appshunter.io/ios/app/kd-app/id6615067013)

**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 KD App free?

KD App 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 KD App or Viki AI have ads?

Neither KD App nor Viki AI shows ads.

### Which is updated more often, KD App or Viki AI?

KD App ships an update monthly, and Viki AI fortnightly. Most recently, KD App was updated on October 18, 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.*