# DEON vs Therapy Notebook TD

The clearest difference is in-app purchases: DEON at none against Therapy Notebook TD's 2. DEON also leads on iOS requirement (14.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Therapy Notebook TD sells 2 in-app purchases, starting at $2.99 per month. DEON asks for nothing beyond the download.

DEON ships an update every 3 weeks, Therapy Notebook TD every 2 weeks. Both last shipped on September 10, 2026.

## The numbers

| Metric | DEON | Therapy Notebook TD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 182 MB | 29 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Deon GmbH & Co.KG](https://appshunter.io/developer/540001112) | [Alper CUHADAROGLU](https://appshunter.io/developer/6776618833) |

## What reviewers say

### DEON

[App page](https://appshunter.io/ios/app/deon/id1614824628)

**In-app purchases:** none


### Therapy Notebook TD

[App page](https://appshunter.io/ios/app/therapy-notebook-td/id6776618831)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Therapy Notebook Premium | $2.99 | per month |
| Therapy Notebook Premium | $29.99 | per year |


## Frequently asked questions

### Is DEON free?

DEON is free to download, with no in-app purchases.

### Is Therapy Notebook TD free?

Therapy Notebook TD is free to download, with in-app purchases available.

### Do DEON or Therapy Notebook TD have ads?

Neither DEON nor Therapy Notebook TD shows ads.

### Which is updated more often, DEON or Therapy Notebook TD?

DEON ships an update every 3 weeks, and Therapy Notebook TD every 2 weeks. Most recently, DEON was updated on September 10, 2026 and Therapy Notebook TD on September 10, 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.*