# Abaculator vs Liminal

The clearest difference is in-app purchases: Abaculator at none against Liminal's 1. Abaculator also leads on iOS requirement (15.6 vs 17.0). Liminal's advantage is update cadence (every 3 weeks vs every 35 months). On price, ads and device support there is nothing between them.

Both are free to download. Liminal sells 1 one-off in-app purchase. Abaculator asks for nothing beyond the download.

Abaculator ships an update every 35 months, Liminal every 3 weeks. The most recent releases landed on October 22, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Abaculator | Liminal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/liminal-the-atrium/id6787131819/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 45 MB | 10 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Chi-Cheng Liao](https://appshunter.io/developer/1053803113) | [Hessam Zahedi](https://appshunter.io/developer/6785146214) |

## What reviewers say

### Abaculator

[App page](https://appshunter.io/ios/app/abaculator/id1634634260)

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

**In-app purchases:** none


### Liminal

[App page](https://appshunter.io/ios/app/liminal-the-atrium/id6787131819)

Engage in thoughtful conversations with AI reconstructions of great minds. Explore philosophical concepts through interactive games and unique encounters designed for quiet reflection. Many features are available offline and free to use.

**Highlights:** AI reconstructions of great minds, Interactive philosophical games, Poetry generation, Question and answer sessions, Thought experiments, Offline play, No ads or tracking

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Credits | $9.99 | one-time |


## Frequently asked questions

### Is Abaculator free?

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

### Is Liminal free?

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

### Do Abaculator or Liminal have ads?

Neither Abaculator nor Liminal shows ads.

### Which is updated more often, Abaculator or Liminal?

Abaculator ships an update every 35 months, and Liminal every 3 weeks. Most recently, Abaculator was updated on October 22, 2026 and Liminal on October 11, 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.*