# Undermore vs CausalChain

The clearest difference is in-app purchases: CausalChain at none against Undermore's 5. Undermore's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 27.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Undermore sells 5 in-app purchases, starting at $4.99 per month. CausalChain asks for nothing beyond the download.

Undermore ships an update every 10 days, CausalChain every 3 weeks. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Undermore | CausalChain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/undermore/id6753686902/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 133 MB |
| Requires iOS | **15.1** | 27.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [UNDERMORE FZ-LLC](https://appshunter.io/developer/1844410610) | [Dmytro Yerebakan](https://appshunter.io/developer/1886243084) |

## What reviewers say

### Undermore

[App page](https://appshunter.io/ios/app/undermore/id6753686902)

Explore your inner world with a smart journal and analytical tools designed for self-discovery. Understand your dreams, reflections, and subconscious to foster personal growth and reduce anxiety. This app offers a guided dialogue with your inner voice.

**Highlights:** Smart dream journal, Dual dream interpretations, Pattern and symbol tracking, Meditations and anxiety reduction exercises, Capture creative insights, Psyche dynamics observation

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Premium Monthly Subscription | $19.99 | per month |
| Basic year | $53.99 | per year |
| Annual Subscription 7-day free | $191.99 | per year |
| Annual Subscription | $191.99 | per year |


### CausalChain

[App page](https://appshunter.io/ios/app/causalchain/id6760855291)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Undermore free?

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

### Is CausalChain free?

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

### Do Undermore or CausalChain have ads?

Neither Undermore nor CausalChain shows ads.

### Which is updated more often, Undermore or CausalChain?

Undermore ships an update every 10 days, and CausalChain every 3 weeks. Most recently, Undermore was updated on October 2, 2026 and CausalChain on October 6, 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.*