Calendars vs HiCal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calendars
This app combines a calendar, task manager, daily planner, and habit tracker. It helps users plan their day, build habits, boost productivity, and stay organized with seamless syncing across all Apple devices. Features include event creation, to-do list management, natural language input, and integration with popular meeting platforms.
- Calendar, task, and habit management
- Daily, weekly, and monthly views
- Natural language event creation
- To-do list organization
- Cross-device syncing
- Meeting platform integration
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Calendars by Readdle is the all-in-one calendar, task manager, daily planner, and habit tracker — seamlessly working across all your Apple devices: Mac, iPhone, iPad, and Apple Watch. Plan your day, build better habits, boost productivity, and stay organized with powerful features and smooth sync between all your devices. What you can do with Calendars: • View and manage your calendar with daily, weekly, and monthly views • Create events, set reminders, and never miss important dates • Use the built-in agenda planner to focus on what matters most • Organize your to-do list and manage your tasks with ease • Quickly add events or to-do items using natural language • Build routines and track your habits to stay consistent • Take a guided productivity course to improve time management and focus • Sync across devices with Google Calendar, iCloud, and more • Customize your planner calendar with color coding and widgets • Join Zoom, Google Meet, or GoToMeeting directly from your calendar • Stay in control of your time, wherever you are Whether you're planning a busy workday, building new habits, or working on personal growth, Calendars brings everything together to help you own your time — across all your Apple devices. Privacy Policy: https://readdle.com/calendars/legal/privacy Terms of Service: https://readdle.com/calendars/legal/terms Have questions, comments, or issues? Don’t hesitate to reach out to us at http://readdle.com/contact
HiCal
This app facilitates collaborative event planning and scheduling for groups. Share timetables, receive real-time updates on changes, and communicate via comments. Ideal for students, project teams, and organizations to stay synchronized.
- Group event scheduling
- Real-time push notifications
- Event comments and discussion
- Shared timetables
- Private and public groups
- Event repetition support
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Organize yourselves for your classes, projects, or company with HiCal, the collaborative calendar! Create or join your class’ or club’s group, and get your shared timetable in your pocket. You can be part of multiple groups. You will receive Push notifications each time that a group’s event is modified, or an event is commented. Event repetition is supported (including “once every two weeks”). HiCal helps you to organize yourself and to collaborate with your friends and colleagues in different situations: - Students and pupils: Add comments to a lesson at a given day, to indicate homework and exams for example, and they will instantly be synced across smartphones and tablets, and shared with your class. You will not ever ask yourself again what is left to do: the answer will be in your pocket, up-to-date, at any moment. Even if only one person indicates the exams to come, everyone will be aware: one for all, and all for one! - Projects: Determine deadlines with your teammates, and discuss them in the comments! Your project is a secret? Then create a secret group, which will be hidden from the group search results. Only the people you add will be able to join the group. - Companies, clubs and organizations: Write down meetings’ or activities’ dates and locations, suggest or edit in real time, and instantly update all your fellows of a schedule change, thanks to push notifications. - Organize public events: Create a group, open to everyone, to let people stay tuned about your upcoming events! In this kind of group, only the group’s administrators can create or edit events. Thus, you can share your events, your live sessions for example if you’re a band, while keeping control. And if something unexpected happens, you can inform group’s members thanks to comments and push notifications! - Education: If you are an educational institution (school, college, university...), you can also use HiCal, by creating a group for each class or course, and inviting your students in them. Simplify your teachers’ and students’ life with HiCal!
Screenshots
Verdict
The clearest difference is in-app purchases: HiCal at none against Calendars's 20. HiCal also leads on iOS requirement (13.0 vs 18.2). Calendars's advantage is ratings volume (122K vs 23) and update cadence (every 11 days vs every 2 months). On price, rating, review sentiment and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Calendars sells 18 in-app purchases, starting at $3.99 per month. HiCal asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for Calendars against 4.7 for HiCal. That said, the two scores are not equally well evidenced: Calendars has 122K ratings behind it against 23, so its average is the more settled of the two. Written reviews split almost evenly too, at 55% and 55% positive.
Calendars ships an update every 11 days, HiCal every 2 months. The most recent releases landed on September 25, 2026 and September 7, 2026 respectively.
| Parameter | Calendars | HiCal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (122K ratings) | 4.7 (23 ratings) |
| Positive reviews | 55.4% of reviews — better | 55.0% of reviews |
| Number of ratings | 122K — better | 23 |
| Update frequency | Every 11 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | #102 — better | — |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 18.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 407 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Readdle Technologies Limited | Nakagawa Yugo |
Customer experience
Calendars
HiCal
Bugs and requests
Calendars
Reported bugs
3 issues- Disappearing events and appointments
- Upgrade process causing data loss
- Freezing and crashing on certain devices
Requested features
5 requests- 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
HiCal
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calendars
- Calendars PRO 1 Month$3.991 Month
- Calendars by Readdle: Interesting Calendars1 Month trial$3.991 Year
- Calendars PRO 1 Month7 Days trial$3.991 Month
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- Calendars PRO 1 Year3 Months trial$19.991 Year
- Calendars PRO 1 Year7 Days trial2 variants$19.991 Year
- Calendars PRO 1 Year1 Year trial$19.991 Year
- Calendars PRO 1 Year14 Days trial$19.991 Year
- Calendars PRO 1 Year7 Days trial$21.991 Year
- Calendars PRO 1 Year7 Days trial$29.991 Year
- Calendars PRO LifetimeFree
- Invites & Attendees Upgrade$1.99
- Smart Input Upgrade$1.99
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- Full Upgrade$4.99
- Interesting Calendars$5.99
- My schedule planner, Organizer$6.99
- Full Pack$12.99
- Reminders & Calendars$19.99
- Recurring Events$31.99
HiCal
No in-app purchases









