# The mark experiment vs Cardinal Bible

The clearest difference is in-app purchases: The mark experiment at none against Cardinal Bible's 2. The mark experiment also leads on iOS requirement (9.2 vs 17.0). Cardinal Bible's advantage is update cadence (every 2 days vs every 31 months). On price, ads and device support there is nothing between them.

Both are free to download. Cardinal Bible sells 2 in-app purchases, starting at $2.99 per month. The mark experiment asks for nothing beyond the download.

The mark experiment ships an update every 31 months, Cardinal Bible every 2 days. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | The mark experiment | Cardinal Bible |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (14 ratings)](https://appshunter.io/ios/app/cardinal-bible/id6758185643/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 14 MB | 99 MB |
| Requires iOS | **9.2** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 9+ |
| Developer | [Jonas Kellert](https://appshunter.io/developer/1187446918) | [Jed Bridges](https://appshunter.io/developer/1844479841) |

## What reviewers say

### The mark experiment

[App page](https://appshunter.io/ios/app/the-mark-experiment/id1187446919)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cardinal Bible

[App page](https://appshunter.io/ios/app/cardinal-bible/id6758185643)

This app offers a distraction-free Bible reading experience with offline access to multiple translations. It includes features for listening to scripture, asking questions about passages, guided quiet time, and memorization tools.

**Highlights:** Offline Bible reading, Multiple free translations, Scripture audio playback, Verse highlighting and notes, Guided quiet time sessions, Scripture memorization practice, Sermon note-taking

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cardinal Pro | $2.99 | per month |
| Cardinal Pro | $19.99 | per year |


## Frequently asked questions

### Is The mark experiment free?

The mark experiment is free to download, with no in-app purchases.

### Is Cardinal Bible free?

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

### Do The mark experiment or Cardinal Bible have ads?

Neither The mark experiment nor Cardinal Bible shows ads.

### Which is updated more often, The mark experiment or Cardinal Bible?

The mark experiment ships an update every 31 months, and Cardinal Bible every 2 days. Most recently, The mark experiment was updated on October 26, 2026 and Cardinal Bible on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*