# e4 vs Greystone

The clearest difference is iOS requirement: e4 at 7.0 against Greystone's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. e4 sells 10 one-off in-app purchases and Greystone sells 3 in-app purchases, starting at $17.99 per month. Whichever you choose, the download price is not the number that matters.

e4 ships an update every 2 months, Greystone every 3 months. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | e4 | Greystone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/e4/id489182759/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 32 MB |
| Requires iOS | **7.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [e4](https://appshunter.io/developer/478705851) | [Greystone Theological Institute](https://appshunter.io/developer/1791639499) |

## What reviewers say

### e4

[App page](https://appshunter.io/ios/app/e4/id489182759)

Access in-depth biblical and theological courses taught by distinguished scholars. Explore topics from apologetics to faith and science through lectures and Q&A sessions. Offers over 120 hours of content, with some courses available for free and others at a low cost.

**Highlights:** Biblical and theological courses, Taught by distinguished scholars, Lectures and Q&A sessions, Transcribed content, Synchronized video and text, Over 120 hours of content

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Christianity: the Future | $0.99 | one-time |
| Medical Ethics | $0.99 | one-time |
| Media Culture | $2.99 | one-time |
| Martin Luther | $3.99 | one-time |
| Biblical Stewardship | $4.99 | one-time |
| Apologetics | $4.99 | one-time |
| Faith & Science | $4.99 | one-time |
| re:Formation | $4.99 | one-time |
| The Divine Conspiracy | $4.99 | one-time |
| The Provocative Church | $4.99 | one-time |


### Greystone

[App page](https://appshunter.io/ios/app/greystone/id6740783023)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Greystone Monthly Membership | $17.99 | per month |
| Greystone Membership Plus | $29.99 | per month |
| Greystone Annual Membership | $197.99 | per year |


## Frequently asked questions

### Is e4 free?

e4 is free to download, with in-app purchases available.

### Is Greystone free?

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

### Do e4 or Greystone have ads?

Neither e4 nor Greystone shows ads.

### Which is updated more often, e4 or Greystone?

e4 ships an update every 2 months, and Greystone every 3 months. Most recently, e4 was updated on October 6, 2026 and Greystone 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.*