# Fill In Studio vs AestraBook

Fill In Studio and AestraBook are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Fill In Studio against 5.0 for AestraBook. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Fill In Studio ships an update every 2 weeks, AestraBook every 9 days. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Fill In Studio | AestraBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/fill-in-studio-class-manager/id6756318343/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/aestrabook/id6761083497/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free | Free |
| Size | 61 MB | 43 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fill In LLC](https://appshunter.io/developer/1846910963) | [DVNTND LLC](https://appshunter.io/developer/1863528080) |

## What reviewers say

### Fill In Studio

[App page](https://appshunter.io/ios/app/fill-in-studio-class-manager/id6756318343)

This app helps fitness studios and gyms fill empty class spots by connecting them with local clients seeking last-minute bookings. Easily post classes, create discounted deals, and manage all your bookings and payments securely.

**Highlights:** Studio dashboard for bookings and revenue, Post classes with details and photos, Create flash deals for last-minute openings, Manage class bookings and attendee lists, Secure Stripe Connect payouts, Instant notifications for new bookings

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

**In-app purchases:** none


### 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 Fill In Studio free?

Fill In Studio is free to download, with no in-app purchases.

### Is AestraBook free?

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

### Which has better reviews, Fill In Studio or AestraBook?

Fill In Studio and AestraBook are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Fill In Studio or AestraBook have ads?

Neither Fill In Studio nor AestraBook shows ads.

### Which is updated more often, Fill In Studio or AestraBook?

Fill In Studio ships an update every 2 weeks, and AestraBook every 9 days. Most recently, Fill In Studio was updated on October 10, 2026 and AestraBook on October 24, 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.*