# FieldServiceOS vs BookAPT

The clearest difference is update cadence: FieldServiceOS at every 2 days against BookAPT's every 5 weeks. BookAPT's advantage is iOS requirement (16.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. FieldServiceOS sells 1 in-app purchase, starting at $14.99 per month and BookAPT sells 6 in-app purchases, starting at $29.99 per month. Whichever you choose, the download price is not the number that matters.

FieldServiceOS ships an update every 2 days, BookAPT every 5 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | FieldServiceOS | BookAPT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 weeks |
| Size | 22 MB | 149 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Aitor Recalde](https://appshunter.io/developer/1805666679) | [ORYN INC](https://appshunter.io/developer/1862017774) |

## What reviewers say

### FieldServiceOS

[App page](https://appshunter.io/ios/app/fieldserviceos/id6755404926)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Monthly | $14.99 | per month |


### BookAPT

[App page](https://appshunter.io/ios/app/bookapt/id6756637557)

**Features:** Apple Wallet

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Plan - USD $29.99 | $29.99 | per month |
| Professional - USD $79.99 | $79.99 | per month |
| Business Plan - USD $149.99 | $149.99 | per month |
| 20 Appt Credits -USD $4.99 | $19.99 | one-time |
| 40 Appt Credits - USD $9.99 | $31.99 | one-time |
| 100 Appt Credits - USD $24.99 | $59.99 | one-time |


## Frequently asked questions

### Is FieldServiceOS free?

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

### Is BookAPT free?

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

### Do FieldServiceOS or BookAPT have ads?

Neither FieldServiceOS nor BookAPT shows ads.

### Which is updated more often, FieldServiceOS or BookAPT?

FieldServiceOS ships an update every 2 days, and BookAPT every 5 weeks. Most recently, FieldServiceOS was updated on October 25, 2026 and BookAPT on October 25, 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.*