# RussiaFast vs LangKai

The clearest difference is update cadence: LangKai at every 4 days against RussiaFast's every 10 months. RussiaFast's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RussiaFast sells 10 in-app purchases, starting at $9.99 per 7 days and LangKai sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

RussiaFast ships an update every 10 months, LangKai every 4 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RussiaFast | LangKai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 days** |
| Size | 58 MB | 15 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Oleg Sokolov](https://appshunter.io/developer/1628122395) | [David Comas Mendez](https://appshunter.io/developer/6787847555) |

## What reviewers say

### RussiaFast

[App page](https://appshunter.io/ios/app/russiafast/id6739005811)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Russian Weekly Subscription | $9.99 | per 7 days |
| Russian Monthly Subscription | $19.99 | per month |
| Russian Yearly Subscription | $49.99 | per year |
| Russian Lesson 4 | $14.99 | one-time |
| Russian Lesson 7 | $14.99 | one-time |
| Russian Lesson 8 | $14.99 | one-time |
| Russian Lesson 10 | $14.99 | one-time |
| Russian Lesson 6 | $14.99 | one-time |
| Russian Lesson 9 | $14.99 | one-time |
| Russian Lifetime Subscription | $59.99 | one-time |


### LangKai

[App page](https://appshunter.io/ios/app/langkai/id6792323515)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium mensual | $2.99 | per month |
| Premium anual | $22.99 | per year |


## Frequently asked questions

### Is RussiaFast free?

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

### Is LangKai free?

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

### Do RussiaFast or LangKai have ads?

Neither RussiaFast nor LangKai shows ads.

### Which is updated more often, RussiaFast or LangKai?

RussiaFast ships an update every 10 months, and LangKai every 4 days. Most recently, RussiaFast was updated on October 25, 2026 and LangKai 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.*