# Prepscale vs KAS Mentor

Prepscale and KAS Mentor are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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. Prepscale sells 3 one-off in-app purchases and KAS Mentor sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Prepscale ships an update every 9 months, KAS Mentor every 5 months. The most recent releases landed on September 10, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Prepscale | KAS Mentor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 months** |
| Size | 94 MB | 46 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Techspence Private Limited](https://appshunter.io/developer/1611014317) | [KAS Mentor](https://appshunter.io/developer/1704139224) |

## What reviewers say

### Prepscale

[App page](https://appshunter.io/ios/app/prepscale/id1611014285)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LPUP MATHS AND MENTAL ABILITY | $12.99 | one-time |
| LPUP FACTS ABOUT INDIA | $14.99 | one-time |
| signals & system (ioS) | $14.99 | one-time |


### KAS Mentor

[App page](https://appshunter.io/ios/app/kas-mentor/id6463204258)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kerala PSC | Free | one-time |
| Kerala PSC | $9.99 | one-time |
| Kerala PSC | $119.99 | one-time |
| Kerala PSC | $129.99 | one-time |
| Kerala PSC | $149.99 | one-time |
| Kerala PSC | $199.99 | one-time |
| Kerala PSC | $249.99 | one-time |
| Kerala PSC | $299.99 | one-time |
| Kerala PSC | $799.99 | one-time |


## Frequently asked questions

### Is Prepscale free?

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

### Is KAS Mentor free?

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

### Do Prepscale or KAS Mentor have ads?

Neither Prepscale nor KAS Mentor shows ads.

### Which is updated more often, Prepscale or KAS Mentor?

Prepscale ships an update every 9 months, and KAS Mentor every 5 months. Most recently, Prepscale was updated on September 10, 2026 and KAS Mentor on September 13, 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.*