# Calendars vs Shiftool

The clearest difference is ads: Calendars at none against Shiftool's shown. Calendars also leads on chart position (#137 vs unranked). Shiftool's advantage is iOS requirement (15.6 vs 18.2). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Calendars sells 18 in-app purchases, starting at $3.99 per month and Shiftool sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Calendars ships an update weekly, Shiftool every 2 weeks. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Calendars | Shiftool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (123K ratings)](https://appshunter.io/ios/app/calendars-schedule-planner/id608834326/reviews)** | — |
| Number of ratings | **123K** | — |
| Positive reviews | 55.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Freemium | — |
| Best chart rank | **#137** | — |
| Size | 413 MB | 94 MB |
| Requires iOS | 18.2 | **15.6** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Readdle Technologies Limited](https://appshunter.io/developer/285035419) | [Shiftool SL](https://appshunter.io/developer/1812390523) |

## What reviewers say

### Calendars

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

**Currently charting:** #137 Top Grossing · Productivity, #153 Top Free · Productivity (US App Store)

This app combines calendar, task management, and habit tracking to boost productivity and organization. It offers seamless syncing across Apple devices and integrates with popular services like Google Calendar. Plan your day, manage tasks, and build routines with customizable views and features.

**Highlights:** Calendar and task management, Habit tracking and routine building, Cross-device syncing, Natural language event creation, Integration with Google Calendar and Zoom, Customizable views and widgets

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

**In-app purchases (18)**

| 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 | $19.99 | per year |
| Calendars PRO 1 Year | $19.99 | per year |
| Calendars PRO 1 Year | $21.99 | per year |
| Calendars PRO 1 Year | $29.99 | per year |
| Calendars PRO Lifetime | Free | one-time |
| Invites & Attendees Upgrade | $1.99 | one-time |
| Smart Input Upgrade | $1.99 | one-time |
| Full Upgrade | $4.99 | one-time |
| Interesting Calendars | $5.99 | one-time |
| My schedule planner, Organizer | $6.99 | one-time |
| Full Pack | $12.99 | one-time |
| Reminders & Calendars | $19.99 | 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


### Shiftool

[App page](https://appshunter.io/ios/app/shiftool/id6745471193)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium month | $1.99 | per month |
| Premium year | $19.99 | per year |


## Frequently asked questions

### Is Calendars free?

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

### Is Shiftool free?

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

### Do Calendars or Shiftool have ads?

Shiftool shows ads; Calendars does not.

### Which is updated more often, Calendars or Shiftool?

Calendars ships an update weekly, and Shiftool every 2 weeks. Most recently, Calendars was updated on October 31, 2026 and Shiftool on October 28, 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.*