# FieldServiceOS vs AestraBook

The clearest difference is in-app purchases: AestraBook at none against FieldServiceOS's 1. AestraBook also leads on iOS requirement (15.1 vs 18.6). FieldServiceOS's advantage is update cadence (every 2 days vs every 9 days). On price, ads 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. AestraBook asks for nothing beyond the download.

FieldServiceOS ships an update every 2 days, AestraBook every 9 days. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | FieldServiceOS | AestraBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aestrabook/id6761083497/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 9 days |
| Monetization | — | Free |
| Size | 22 MB | 43 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Aitor Recalde](https://appshunter.io/developer/1805666679) | [DVNTND LLC](https://appshunter.io/developer/1863528080) |

## 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 |


### AestraBook

[App page](https://appshunter.io/ios/app/aestrabook/id6761083497)

This platform helps independent business owners manage appointments and showcase their services online. Clients can easily view offerings, check availability, and book services through a customizable page.

**Highlights:** Customizable booking page, Service and pricing management, Appointment scheduling, Deposit collection, Availability control, Client experience enhancement

**In-app purchases:** none


## Frequently asked questions

### Is FieldServiceOS free?

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

### Is AestraBook free?

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

### Do FieldServiceOS or AestraBook have ads?

Neither FieldServiceOS nor AestraBook shows ads.

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

FieldServiceOS ships an update every 2 days, and AestraBook every 9 days. Most recently, FieldServiceOS was updated on October 16, 2026 and AestraBook on October 7, 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.*