# DevPrep vs Noesis

The clearest difference is device support: DevPrep at 4 against Noesis's 2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. DevPrep sells 1 in-app purchase, starting at $2.99 per 6 months and Noesis sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

DevPrep ships an update every 9 days, Noesis every 10 days. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | DevPrep | Noesis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 10 days |
| Size | 28 MB | 111 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Aliaksei Yelin](https://appshunter.io/developer/1502827500) | [Abhishek Chauhan](https://appshunter.io/developer/1886624177) |

## What reviewers say

### DevPrep

[App page](https://appshunter.io/ios/app/devprep-coding-interview/id1527624816)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get full access | $2.99 | per 6 months |


### Noesis

[App page](https://appshunter.io/ios/app/noesis-math-physics-finance/id6804661027)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Noesis Monthly | $12.99 | per month |
| Noesis Yearly | $34.99 | per year |


## Frequently asked questions

### Is DevPrep free?

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

### Is Noesis free?

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

### Do DevPrep or Noesis have ads?

Neither DevPrep nor Noesis shows ads.

### Which is updated more often, DevPrep or Noesis?

DevPrep ships an update every 9 days, and Noesis every 10 days. Most recently, DevPrep was updated on October 5, 2026 and Noesis on October 7, 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.*