# CALF™ vs Occult Science

The clearest difference is in-app purchases: CALF™ at none against Occult Science's 1. CALF™ also leads on update cadence (monthly vs every 11 months) and iOS requirement (11.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. Occult Science sells 1 one-off in-app purchase. CALF™ asks for nothing beyond the download.

CALF™ ships an update monthly, Occult Science every 11 months. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CALF™ | Occult Science |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 11 months |
| Size | 89 MB | 320 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NuVeda Learning Private Limited](https://appshunter.io/developer/1272718926) | [ALL INDIA INSTITUTE OF OCCULT SCIENCE](https://appshunter.io/developer/1610107660) |

## What reviewers say

### CALF™

[App page](https://appshunter.io/ios/app/calf/id1272718927)

**In-app purchases:** none


### Occult Science

[App page](https://appshunter.io/ios/app/occult-science/id1610107658)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diploma in Tarot 2022-Batch 3 | $22.99 | one-time |


## Frequently asked questions

### Is CALF™ free?

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

### Is Occult Science free?

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

### Do CALF™ or Occult Science have ads?

Neither CALF™ nor Occult Science shows ads.

### Which is updated more often, CALF™ or Occult Science?

CALF™ ships an update monthly, and Occult Science every 11 months. Most recently, CALF™ was updated on October 3, 2026 and Occult Science 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.*