# Caleido (formerly Event Book) vs Calendars

The clearest difference is rating: Calendars at 4.7 against Caleido (formerly Event Book)'s 3.8. Calendars also leads on update cadence (weekly vs every 2 months) and ratings volume (123K vs 5). Caleido (formerly Event Book)'s advantage is in-app purchases (none vs 10) and review sentiment (74% vs 56%). On price and ads there is nothing between them.

Both are free to download. Calendars sells 10 in-app purchases, starting at $3.99 per month. Caleido (formerly Event Book) asks for nothing beyond the download.

Calendars holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: Calendars has 123K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 74% of Caleido (formerly Event Book)'s written reviews are positive against 56% of Calendars's, so the app with the better star average is not the one people write more warmly about.

Caleido (formerly Event Book) ships an update every 2 months, Calendars weekly. The most recent releases landed on November 6, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Caleido (formerly Event Book) | Calendars |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/caleido-formerly-event-book/id599232745/reviews) | **[4.7 (123K ratings)](https://appshunter.io/ios/app/calendars-schedule-planner/id608834326/reviews)** |
| Number of ratings | 5 | **123K** |
| Positive reviews | **73.5% of reviews** | 56.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#109** |
| Size | 13 MB | 414 MB |
| Requires iOS | **7.0** | 18.2 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Abhinay Ashutosh](https://appshunter.io/developer/599232748) | [Readdle Technologies Limited](https://appshunter.io/developer/285035419) |

## What reviewers say

### Caleido (formerly Event Book)

[App page](https://appshunter.io/ios/app/caleido-formerly-event-book/id599232745)

This app offers a streamlined approach to managing your schedule and to-dos. It features a customizable interface with integrated map and weather information for efficient planning. Syncs with existing calendars and provides multiple view options for events and tasks.

**Highlights:** Calendar and task management, Customizable interface, Map and weather integration, Syncs with existing calendars, Multiple view options (day, week, month, list, location, task), Event and task management

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Clean, intuitive, and minimalist interface
- 📅 Multiple view options (day, week, month)
- ⚡ Fast and responsive performance
- 🎨 Beautiful design with customizable themes
- 🔗 Seamless integration with iOS calendar

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- 🐛 Weather widget not working properly
- 🐛 Location/map integration failures
- 🐛 Alarm/notification system unreliable
- ❌ No push notifications for reminders

**Reported bugs**

- App crashes when setting alarms or editing events
- Weather widget fails to load or display
- Location services cause repeated permission requests
- Month view displays events one day before actual date
- Week view shows incorrect day labels (Sunday appears twice)

**Requested features**

- Push notifications for events and reminders
- Color coding for different calendars
- Search functionality for events
- Facebook birthday integration
- Natural language event input


### Calendars

[App page](https://appshunter.io/ios/app/calendars-schedule-planner/id608834326)

**Currently charting:** #109 Top Free · Productivity, #137 Top Grossing · Productivity (US App Store)

This app helps you manage your schedule, tasks, and habits across all your Apple devices. It offers features for planning your day, building routines, and boosting productivity with seamless syncing and integration with other calendar services.

**Highlights:** Daily, weekly, monthly calendar views, Event creation and reminders, Integrated agenda planner, To-do list and task management, Natural language event/task input, Habit tracking and routine building, Cross-device syncing

**Features:** Family Sharing, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calendars PRO 1 Month | $3.99 | per month |
| Calendars by Readdle: Interesting Calendars | $3.99 | per year |
| Calendars PRO 1 Month | $3.99 | per month |
| Calendars PRO 1 Year | $19.99 | per year |
| Calendars PRO 1 Year | $19.99 | per year |
| Calendars PRO 1 Year | $21.99 | per year |
| Smart Input Upgrade | $1.99 | one-time |
| My schedule planner, Organizer | $6.99 | one-time |
| Full Pack | $12.99 | one-time |
| Recurring Events | $31.99 | one-time |

**What reviewers like**

- 🌟 Excellent calendar app
- 👍 Easy to use and organize
- 🎨 Helpful color-coding
- 📆 Seamless integration with other calendars
- 🗓️ Detailed monthly/weekly views

**What reviewers complain about**

- 🐛 Occasional glitches and data loss
- 💰 Concerns over subscription model
- 🕰️ Cumbersome date/time selection process
- 🔍 Limited location search functionality
- 🔄 Sync issues between devices

**Reported bugs**

- Disappearing events and appointments
- Upgrade process causing data loss
- Freezing and crashing on certain devices

**Requested features**

- Recurring events for free users
- Customizable widgets and app icons
- Ability to archive/restore past events
- Improved Apple Watch integration
- Shared calendars and family management


## Frequently asked questions

### Is Caleido (formerly Event Book) free?

Caleido (formerly Event Book) is free to download, with no in-app purchases.

### Is Calendars free?

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

### Which has better reviews, Caleido (formerly Event Book) or Calendars?

Calendars is rated higher. Caleido (formerly Event Book) averages 3.8 out of 5 from 5 ratings, while Calendars averages 4.7 from 123K ratings.

### Do Caleido (formerly Event Book) or Calendars have ads?

Neither Caleido (formerly Event Book) nor Calendars shows ads.

### Which is updated more often, Caleido (formerly Event Book) or Calendars?

Caleido (formerly Event Book) ships an update every 2 months, and Calendars weekly. Most recently, Caleido (formerly Event Book) was updated on November 6, 2026 and Calendars on November 13, 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.*