Calendars
Calendars by Readdle offers a visually appealing and feature-rich experience for managing schedules, but recent updates have introduced significant syncing issues, data loss, and aggressive monetization tactics that frustrate long-time users.
Calendars by Readdle is a productivity app praised for its intuitive interface, color-coding, and integration with other services like Apple Reminders. However, recent user reviews highlight critical problems including events disappearing, syncing failures across devices, and a shift to a subscription model that has alienated previous lifetime purchasers.
What users like
- Visually appealing and intuitive interface with good layout and color-coding optionsR12R23R28R34
- Effective for managing multiple calendars and integrating with Apple Reminders and tasksR11R27R31R52
- Useful features like natural language input and customisable remindersR48R52R68
- Strong customer support for resolving issues (though not universally experienced recently)R26R35R91
What users complain about
- Frequent data loss and events disappearing from calendarsR1R25R44R46
- Significant syncing issues across iPhone, iPad, and Mac devicesR3R16R32R45
- Aggressive and confusing push for subscriptions, alienating lifetime purchasersR4R39R51R53
- Core features like recurring events and task management are now paywalled or limited in the free versionR9R20R29R33
- App is buggy, slow, crashes frequently, and has usability issues on desktop and mobileR3R40R60R75
- Spam notifications and unwanted calendar entries are appearing for some usersR6R13R43R124
- Lack of full feature parity and consistent experience between mobile and desktop versionsR3R9R16R29
Latest update · v5.37.31
What the developer says changed (the verdict above weighs this against what reviewers report):
We’ve refined the app's overall performance to ensure your planning remains smooth and accurate. Got ideas or feedback? Send them our way: [email protected].
Recurring themes
Who it's for
This app is for users who prioritize a visually appealing, color-coded calendar with good integration with Apple Reminders and tasks, and are willing to pay for a premium subscription R11R12R34R52. It is NOT for users who rely on flawless syncing across multiple Apple devices, cannot tolerate data loss, or are unwilling to pay a subscription, especially if they previously had lifetime access to older versions R1R4R25R44.
Evidence note: The recent reviews skew heavily negative, contradicting the developer's claim of 'refined overall performance' as many users report increased bugs, crashes, and syncing issues post-update R3R40R75. The lifetime rating is high, but the recent sentiment indicates a significant decline in user satisfaction, particularly around stability and monetization.
Frequently asked
Does Calendars by Readdle sync across all devices?
Is Calendars by Readdle a free app?
Do events disappear from Calendars by Readdle?
What reviewers actually said
Built only from these 120 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.
- [R12] The best Calendar App BY FAR: I have tried dozens of calendar apps searching for the best one and this is it no doubt. It is the simple details that go a long way like the weekly visualization, or the thin font that allows you to see complete words, the friendly user experience. I love it and wouldn’t change it for the world.
- [R23] Calendar App Review: I have been using this calendar app for a couple years. It works fine and has a better layout than other calendar programs. It is intuitive. A couple changes/additions I would like to see: (1) Need YEAR view. I should not have to use the native calendar for this, and (2) I want to have a choice whether the program auto-modifies my event title when entering names and dates. I
- [R28] Very useful but: It will pick up numbers in my heading line and throw them into the date/time, changing my entries. Other than that, it is excellent. I love choosing colors for color coding the entries ( for me green = money matters, red = must do, blue = special fun possibilities).
- [R34] CALENDARS APP: This app is the most valuable app on my i-phone. The option to pick a myriad of different colored blocks PER DAY is awesome, (I use one color for travel, a different color for medical, a different color for meetings, a different color for family, and yet another color for friends)! This makes it so easy to look at 1 day & see all that you must take care of.
- [R11] Life changing: As someone who has a completely flexible schedule for the first time in my life (self employed, a lot of travel days, etc) I found I suddenly had a great need for a calendar that can also function as a daily planner. I have already been using Calendars for years (initially Calendars 5), and was searching paid task management apps, but it turns out I didn’t need them. The integrat
- [R27] Finally organized: I LOVE this app. I had three calendars and now I have one. It works across my devices. Laptop and phone. I can't praise this enough.
- [R31] Great tool for seeing multiple calendars simultaneously: Calendars has become one of my most reliable apps. It makes calendaring much easier for me. Seems simple enough, but that's because it stays low-key, does it's job well, and makes the hard work look easy.
- [R52] Such a powerful Calendar app: This is the best calendar app you can get that combines powerful tools, ease of use and sleek look. It helps me manage my schedules, todo tasks, and reminders so easily with its natural language input and syncing with the iOS system. I love the simplicity of its interface and things like drag-and-drop, and color-coded aesthetics. Syncing across devices is a breeze and
- [R48] The Absolute Best: I absolutely love this calendar. I have tried so many over the years and once I found this one I stopped looking. I love the I can set 5 reminder for one event. It has saved me from not only forgetting events but also helps me planning ahead. For example I can put in a person’s birthday and set up reminders in advance so I give myself enough time to buy a present, order the cake
- [R68] Brilliant: I love how easy it is to use this Calendar . Choosing different colours , reminders and repeats most calendars . You just see Dot that you have something on the day , but with this Calendar you can actually see what’s happening that day. Also you can link in football fixtures and Facebook birthdays. it really is the king of Calendars. Holy recommended. 🤴🏻of 📅
- [R26] SAVED MY DAY!!!: Three days ago, opening my Readdle Calendar, I discovered ALL THE EVENTS MY CALENDAR WERE COMPLETELY GONE! I seriously rely on my calendar for appointments and reminders/notifications and had several coming in the next week. I have prostate cancer and had several lab and Dr appointments in the near future. I was REALLY panicked. I Googled to find the Readdle Calendar tech support
- [R35] Exceptional: I had an issue with the Calendars app by Readdle, and I honestly couldn’t be more impressed with how they handled it. Their support team worked with me step by step until everything was completely resolved. It didn’t feel rushed or generic, they actually took the time to understand the problem and walk me through the fix in a way that was clear and reassuring. That level of attention
- [R91] Brilliant Calendar - Displayed Clearly and Easy to Use: I’ve been using this app for years and I love it. Tried the Apple and Google calendars but neither match up to this. Had a little panic when iOS software updated and changed the settings, but I emailed Readdle (Developer) and they responded within an hour with the solution. Great app, great customer service. Would highly recommend.
- [R1] Lost info: I lost every entry on my IPhone calendar 5 days ago
- [R25] Everything keeps getting wiped.: I really like this app so i ended up buying the premium, ever since then there have been a couple times where i open up the app and literally every event or task or anything is deleted. I have a bad memory which is why i yknow use a calendar, i cant keep re entering every single event including every one of my friends and familys birthdays.
- [R44] It’s a sad good bye: Beware of this 3rd party apt!! I loved this app for the past four years. BUT something has happened!!After a recent daylight saving time change on my phone, it triggered every event saved to iCloud to disappear and is UNRETRIEVABLE! I’m lost and frustrated having to start over.
- [R46] Not sure what happened: I’ve been using this calendar for years and have LOVED IT. Randomly in the last week, my calendar events all disappeared. iCloud backup is on and everything so I have no idea where it all went and it was really stressful. If someone reads this, I would love some help because I WANT to keep using this app!!!
- [R3] Nice app when it works: I’ve been using Calendars/Readdle for maybe four years now? Primarily was using it on my iPhone, but began using it on my MacBook and liked the integration across the two devices. The past several months, it feels like the desktop version has not been updated or has been more glitchy than normal. I am not able to drag the window around, and it seems like it’s crashing my co
- [R16] Calendars don’t sync.: I cannot figure out why the app looks one way on my iPad and a completely different way on my iPhone. As of now, I can see a full list of tasks that I created on my iPad but when I open the app on the iPhone, there’s no tab for tasks. I had and paid for calendar 5 but then had to switch to this one because the first one was no longer gonna be supported. Can somebody please
- [R32] Great features, sometimes glitchy: I use Calendars bc it integrates with Zoom for scheduling appointments, and has useful calendar views, unlike Apple’s Calendar. Sometimes the new calendar events do not sync across devices.
- [R45] Something has happened…: This, and Calendars 5 (the predecessor), have been my go to phone calendar app for years. But recently, it been consistently boning me, by not updating my calendars in the cloud, and not being updated by them. (Multiple calendars, iCloud & Google) I’d love a force sync button or something. Too many times lately, I’ve put things in, or changed them, and it the next day or t
- [R4] Harassment: I’ve been a user of this app for years and have the lifetime access. After a new update I am consistently harassed to “upgrade” even though I have lifetime pro access. It will block features from me until I close the app and reopen it. I’m worried that either myself or my wife is going to accidentally hit subscribe and end up paying for an app we paid for life years ago. People who sup
- [R39] Bummer.: Bought this app yearssss ago. Now they charge a huge annual fee to continue to use the features you’ve already been using. Finding a new calendar app now.
- [R51] Carrot, not stick: I’ve used and enjoyed the yellow calendars app for years. All of a sudden, it updates and now features a nag screen that appears whenever I open the app, telling me that it is “making way” for a new one that, wait for it… costs a sensational £19.49 PER YEAR! I won’t bother discussing the value of this subscription model, the market will bear it or not. However, if you want peop
- [R53] Thanks but no, thanks: I used Calendar 5 for for years and I really liked it. Best of luck with the subscription-based app. I will not follow you on that path. I'm out. I'm moving to BusyCal (SimpleCal and miCal are also good). It does what Calendar 5 does but there is no subscription and the customer support is excellent. ------- Reply to the developer: Too late buddy. I already uninstalled al
- [R9] Used to love it: Was my first go calendar, until recently. All the drag and drop features disappeared. You can’t double click on calendar events and have them open in month view. Just a big loss of features. If it gained them back, I’d keep the subscription. Used to be worth it. Apple Calendar is just as bad.
- [R20] Regret of any past payment for this xhit: After paid again and again you can’t even set up repeat event . Go to heil
- [R29] Great, wud like few more features in free version: Overall good app. I use this on my phone since other calendar apps won’t link w my fam, not sure why. This has been lifesaver for connectivity. Unfortunate that basic desk-top features aren’t available on mobile version- such as setting recurring mtgs (only w “Premium”-fee mobile version). Can’t delete individual items from “pre-made” calendars- i
- [R33] Frustrated: I can’t do multiple reminders or repeats anymore!!!!!
- [R40] What happened??: The latest updates have made this app practically unusable. It’s so tedious to navigate now, and ridiculously buggy - the worst being a daily app freeze often requiring a hard reboot of my phone just to restore usage.
- [R60] Old app is better: This version is overpriced and crashes more.
- [R75] Sluggish, buggy, too unreliable to trust: People added to invites, then suddenly forgotten after I hit save. Synchronization that doesn't really work. Dragging tasks to calendar only works sometimes. Changes to Tasks online don't trickle through to Calendars. No ability to change the visual scale of the calendar, leaving tons of wasted space. No abillity to hide weekends. No ability to find availa
- [R6] What’s going on?: Why is all this junk being added to my Calendar? I have notices from like 4-5 security places that tells me my subscriptions will be renewed and taken out of my bank! Other notices all spam now added to my calendar! Don’t need that so I will have to delete this one and try another app since who needs more junk coming into our lives?
- [R13] Lots of spam: I had loved this app until 2 mos ago.. I got tons of spam alerts that went directly into my calendar day, not text message, not email, but This calendar app, 8-10 spam messages a day. I finally had to transfer all of my events to calendar that comes with the iPhone. Very sad to have to delete this app, especially after just paying for another year recently, but now, No spam alerts.
- [R43] Bad service: Someone was able to get in and my calendar and now I have a reminder every single day for the next forever how long about a bill I don’t owe and I can’t erase it
- [R124] Spam spam spam: Since I downloaded this app…. I get a pot 10 spam emails a day. Did you sell my email address?
- [R14] money-blind company: money-blind company
- [R7] Apple Watch support: I always liked how I could get day of week, plus month day and year. I just noticed that has changed. Now it is just DOW and day. Was there a reason for that change?
- [R8] Holiday calendar: I like the calendar, however, I have opted out of the holidays. There are some very questionable holidays that ate automatically inserted. I suggest now that we have option to choose.
- [R79] No MacBook support: I wish I could give this a 5. On iPhone its fantastic- probably the best. But the fact I can’t use it on my MacBook Air because it isn’t running OS 11 or later is just daft so now need to find another suitable app
- [R83] Really good - what about year view: Really enjoying the app - I dont' understand why yearly view is on the ipad version and not the mac version.
- [R72] Would be a great app...but lack of syncing makes it useless!: The Iphone app and the Mac app simply wont sync. If I add an event in either calendar it doesnt show! If i add an event in the IOS calendar app, it adds instantly to both. I dont want to use the IOS app! Extremely frustrating and wasted over an hour trying to sort. Ironic when the app is there to 'boost productivity'!
- [R56] Great with a but…: It’s a great app, I’ve been using it for years and paid for the premium version almost immediately. But I can’t help but feel the retirement of the yellow paid for app is a cash grab as they move to a subscription model. If feels like everything is a subscription nowadays and they all add up.
Synthesized from 120 recent App Store reviews · updated July 2026 · View on the App Store