# The Simple Scheduler vs Corterra Book

The clearest difference is rating: Corterra Book at 5.0 against The Simple Scheduler's 1.0. Corterra Book also leads on update cadence (every 8 days vs every 6 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Corterra Book holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

The Simple Scheduler ships an update every 6 months, Corterra Book every 8 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | The Simple Scheduler | Corterra Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/the-simple-scheduler/id6449791038/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/corterra-book/id6766128317/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 8 days** |
| Monetization | Free | Free |
| Size | 27 MB | 33 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Simple Scheduler, LLC](https://appshunter.io/developer/1717606115) | [Stem Creations](https://appshunter.io/developer/1833972982) |

## What reviewers say

### The Simple Scheduler

[App page](https://appshunter.io/ios/app/the-simple-scheduler/id6449791038)

This app simplifies business management through intuitive online scheduling. It offers drag-and-drop features for employee schedules, customer invoices, and client appointments, with automated custom reports to streamline operations.

**Highlights:** Drag-and-drop scheduling, Employee scheduling, Customer invoices, Client appointment management, Custom reports, Automated scheduling tools

**In-app purchases:** none


### Corterra Book

[App page](https://appshunter.io/ios/app/corterra-book/id6766128317)

Easily book appointments at your favorite spas, salons, studios, or clinics. View real-time availability, select services and providers, and manage all your bookings in one place without needing to make a phone call.

**Highlights:** Real-time availability browsing, Service and provider selection, Instant booking confirmation, Appointment management, Online intake forms, Promo code application

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

**In-app purchases:** none


## Frequently asked questions

### Is The Simple Scheduler free?

The Simple Scheduler is free to download, with no in-app purchases.

### Is Corterra Book free?

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

### Which has better reviews, The Simple Scheduler or Corterra Book?

Corterra Book is rated higher. The Simple Scheduler averages 1.0 out of 5 from 1 ratings, while Corterra Book averages 5.0 from 1 ratings.

### Do The Simple Scheduler or Corterra Book have ads?

Neither The Simple Scheduler nor Corterra Book shows ads.

### Which is updated more often, The Simple Scheduler or Corterra Book?

The Simple Scheduler ships an update every 6 months, and Corterra Book every 8 days. Most recently, The Simple Scheduler was updated on November 3, 2026 and Corterra Book on November 5, 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.*