# Linguaskill Slay vs 990prep

The clearest difference is update cadence: 990prep at weekly against Linguaskill Slay's every 3 months. Linguaskill Slay's advantage is iOS requirement (13.1 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Linguaskill Slay sells 1 one-off in-app purchase and 990prep sells 2 in-app purchases, starting at $44.99 per month. Whichever you choose, the download price is not the number that matters.

Linguaskill Slay ships an update every 3 months, 990prep weekly. The most recent releases landed on September 10, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Linguaskill Slay | 990prep |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 16 MB | 90 MB |
| Requires iOS | **13.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CommonTown Pte Ltd](https://appshunter.io/developer/425121361) | [Justin De Sio](https://appshunter.io/developer/1881405592) |

## What reviewers say

### Linguaskill Slay

[App page](https://appshunter.io/ios/app/linguaskill-slay/id6756248405)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $3.99 | one-time |


### 990prep

[App page](https://appshunter.io/ios/app/990prep-toeic-training/id6759878981)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $44.99 | per month |
| Annual Premium | $89.99 | per year |


## Frequently asked questions

### Is Linguaskill Slay free?

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

### Is 990prep free?

990prep is free to download, with in-app purchases available.

### Do Linguaskill Slay or 990prep have ads?

Neither Linguaskill Slay nor 990prep shows ads.

### Which is updated more often, Linguaskill Slay or 990prep?

Linguaskill Slay ships an update every 3 months, and 990prep weekly. Most recently, Linguaskill Slay was updated on September 10, 2026 and 990prep on September 25, 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.*