# Behavioral Experiment vs Thoughtline

The clearest difference is in-app purchases: Behavioral Experiment at none against Thoughtline's 3. Thoughtline's advantage is update cadence (every 9 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Thoughtline sells 3 in-app purchases, starting at $9.99 per month. Behavioral Experiment asks for nothing beyond the download.

Behavioral Experiment ships an update every 3 weeks, Thoughtline every 9 days. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Behavioral Experiment | Thoughtline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/behavioral-experiment/id6810320894/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free | — |
| Size | 7 MB | 24 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Everyday Insight LLC](https://appshunter.io/developer/6775709399) | [SITKI TUGRUL YUKSEL](https://appshunter.io/developer/6784825537) |

## What reviewers say

### Behavioral Experiment

[App page](https://appshunter.io/ios/app/behavioral-experiment/id6810320894)

This app helps users test anxious predictions against reality by guiding them through behavioral experiments. It breaks down goals into manageable steps and offers educational articles on anxiety management. Ideal for individuals working on worry or avoidance, with or without a therapist.

**Highlights:** Guided behavioral experiments, Anxiety prediction testing, Step-ladder goal setting, Educational articles on anxiety, Session summary export, Optional reminders

**In-app purchases:** none


### Thoughtline

[App page](https://appshunter.io/ios/app/thoughtline-cbt-thought-diary/id6815751415)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Thoughtline Pro · Monthly | $9.99 | per month |
| Thoughtline Pro · Yearly | $39.99 | per year |
| Thoughtline Pro · Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Behavioral Experiment free?

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

### Is Thoughtline free?

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

### Do Behavioral Experiment or Thoughtline have ads?

Neither Behavioral Experiment nor Thoughtline shows ads.

### Which is updated more often, Behavioral Experiment or Thoughtline?

Behavioral Experiment ships an update every 3 weeks, and Thoughtline every 9 days. Most recently, Behavioral Experiment was updated on October 31, 2026 and Thoughtline on October 29, 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.*