# CarBook vs Shell Notes

The clearest difference is update cadence: CarBook at every 9 days against Shell Notes's every 5 weeks. Shell Notes's advantage is iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CarBook sells 2 in-app purchases, starting at $2.99 per month and Shell Notes sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

CarBook ships an update every 9 days, Shell Notes every 5 weeks. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | CarBook | Shell Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 5 weeks |
| Size | 30 MB | 47 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Artem Izmalkov](https://appshunter.io/developer/1895855313) | [Ivan Dotsenko](https://appshunter.io/developer/551628923) |

## What reviewers say

### CarBook

[App page](https://appshunter.io/ios/app/carbook-car-maintenance-log/id6764626133)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CarBook Plus Monthly | $2.99 | per month |
| CarBook Plus Yearly | $19.99 | per year |


### Shell Notes

[App page](https://appshunter.io/ios/app/shell-notes-encrypted-vault/id6777039055)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shell Notes Pro Weekly | $0.99 | per 7 days |
| Shell Notes Pro Yearly | $9.99 | per year |
| Shell Notes Pro Lifetime | $17.99 | one-time |


## Frequently asked questions

### Is CarBook free?

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

### Is Shell Notes free?

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

### Do CarBook or Shell Notes have ads?

Neither CarBook nor Shell Notes shows ads.

### Which is updated more often, CarBook or Shell Notes?

CarBook ships an update every 9 days, and Shell Notes every 5 weeks. Most recently, CarBook was updated on October 8, 2026 and Shell Notes on October 16, 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.*