# Theralog vs Prism AI

The clearest difference is rating: Theralog at 5.0 against Prism AI's 4.0. Theralog also leads on review sentiment (100% vs 75%) and iOS requirement (16.0 vs 18.2). Prism AI's advantage is ratings volume (20 vs 3). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Theralog sells 3 in-app purchases, starting at $2.99 per 7 days and Prism AI sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Theralog holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Prism AI has 20 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Theralog's written reviews are positive against 75% of Prism AI's.

Theralog ships an update every 10 days, Prism AI every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Theralog | Prism AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/theralog/id6451499105/reviews)** | [4.0 (20 ratings)](https://appshunter.io/ios/app/prism-ai/id6463829543/reviews) |
| Number of ratings | 3 | **20** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 9 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 25 MB | 40 MB |
| Requires iOS | **16.0** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [TabTab](https://appshunter.io/developer/1476661769) | [TherapyAI, Inc.](https://appshunter.io/developer/1791622659) |

## What reviewers say

### Theralog

[App page](https://appshunter.io/ios/app/theralog/id6451499105)

Engage in supportive conversations with an AI companion designed to help you manage stress and anxiety. Explore evidence-based techniques and personalized coping strategies for emotional well-being. This tool offers a safe space for self-expression and insights into your feelings.

**Highlights:** Intelligent conversations, Personalized support, Evidence-based techniques, Emotional check-ins, Safe and confidential, 24/7 availability

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Access | $2.99 | per 7 days |
| Monthly Pro Access | $6.99 | per month |
| Yearly Pro | $69.99 | per year |


### Prism AI

[App page](https://appshunter.io/ios/app/prism-ai/id6463829543)

This AI companion offers personalized mental health support, helping users manage stress and anxiety through interactive conversations. It learns and adapts to your emotional state, providing confidential and secure assistance anytime, anywhere.

**Highlights:** Personalized AI mental health support, Interactive conversations for emotional well-being, Custom check-in notifications, 24/7 support, Learning and adaptation, Confidential and secure conversations

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Therapy AI | $9.99 | per month |
| TherapyAI Pro | $99.99 | per year |


## Frequently asked questions

### Is Theralog free?

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

### Is Prism AI free?

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

### Which has better reviews, Theralog or Prism AI?

Theralog is rated higher. Theralog averages 5.0 out of 5 from 3 ratings, while Prism AI averages 4.0 from 20 ratings.

### Do Theralog or Prism AI have ads?

Neither Theralog nor Prism AI shows ads.

### Which is updated more often, Theralog or Prism AI?

Theralog ships an update every 10 days, and Prism AI every 9 days. Most recently, Theralog was updated on October 24, 2026 and Prism AI on October 24, 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.*