# Prismal vs Obius

The clearest difference is in-app purchases: Prismal at none against Obius's 4. Prismal also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Obius sells 4 in-app purchases, starting at $4.99 per month. Prismal asks for nothing beyond the download.

Prismal ships an update every 10 days, Obius weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Prismal | Obius |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/obius-notes-that-evolve/id6760918821/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | — | Freemium |
| Size | 16 MB | 23 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aditya Asdhir](https://appshunter.io/developer/1722842516) | [DAED LLC](https://appshunter.io/developer/1886797794) |

## What reviewers say

### Prismal

[App page](https://appshunter.io/ios/app/prismal-personal-growth/id6474931240)

**Features:** macOS Compatibility

**In-app purchases:** none


### Obius

[App page](https://appshunter.io/ios/app/obius-notes-that-evolve/id6760918821)

This app offers a visual workspace for organizing notes and ideas. It allows for reusable content blocks, color-coded sections for intent, and AI-powered features for content generation and semantic search. It prioritizes privacy with local-first storage and end-to-end encryption.

**Highlights:** Visual workspace for notes and ideas, Reusable content blocks (Loops), Color-coded sections by intent, AI-powered content generation and search, Version history and snapshots, Offline functionality and end-to-end encryption

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Obius Pro Founder | $4.99 | per month |
| Obius Pro Monthly | $9.99 | per month |
| Pro Annual | $79.99 | per year |
| Power Pack | $9.99 | one-time |


## Frequently asked questions

### Is Prismal free?

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

### Is Obius free?

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

### Do Prismal or Obius have ads?

Neither Prismal nor Obius shows ads.

### Which is updated more often, Prismal or Obius?

Prismal ships an update every 10 days, and Obius weekly. Most recently, Prismal was updated on October 30, 2026 and Obius on October 31, 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.*