# OneSync AI vs Sermon Keeper

The clearest difference is in-app purchases: OneSync AI at none against Sermon Keeper's 3. OneSync AI also leads on update cadence (every 9 days vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Sermon Keeper sells 3 in-app purchases, starting at $6.99 per month. OneSync AI asks for nothing beyond the download.

OneSync AI ships an update every 9 days, Sermon Keeper every 3 weeks. The most recent releases landed on October 6, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | OneSync AI | Sermon Keeper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Size | 30 MB | 64 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [W2S Software Co., Ltd.](https://appshunter.io/developer/1544915807) | [Artur Subbotkin](https://appshunter.io/developer/1874735290) |

## What reviewers say

### OneSync AI

[App page](https://appshunter.io/ios/app/onesync-ai/id6753162210)

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

**In-app purchases:** none


### Sermon Keeper

[App page](https://appshunter.io/ios/app/sermon-keeper-bible-notes/id6758739935)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Yearly | $64.99 | per year |
| Yearly (7-day trial) | $64.99 | per year |


## Frequently asked questions

### Is OneSync AI free?

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

### Is Sermon Keeper free?

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

### Do OneSync AI or Sermon Keeper have ads?

Neither OneSync AI nor Sermon Keeper shows ads.

### Which is updated more often, OneSync AI or Sermon Keeper?

OneSync AI ships an update every 9 days, and Sermon Keeper every 3 weeks. Most recently, OneSync AI was updated on October 6, 2026 and Sermon Keeper on October 19, 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.*