# Calendar Op.2: Planner & Diary — user reviews > 122 indexed App Store user reviews of Calendar Op.2 by Yoshihiro Sakamoto, rated 4.70/5 from 13,330 ratings. - Source: https://appshunter.io/ios/app/calendar-op2-planner-and-diary/id1097430896/reviews - App overview in markdown: https://appshunter.io/ios/app/calendar-op2-planner-and-diary/id1097430896.md - Rating breakdown: 5★ 10,577 · 4★ 1,714 · 3★ 596 · 2★ 165 · 1★ 278 ## What do users think of Calendar Op.2? Overall sentiment: positive **Pros** - 👍 Easy to use - 🚀 Efficient calendar view - 💡 Customizable color coding - 🔒 Secure and private - 🌟 Great alternative to default calendar **Cons** - 🐛 Issues with date/day synchronization - 🔍 Limited color options - 📱 No iPad version - 🕰️ Can't schedule in 15-minute intervals - 🔔 Ads can be intrusive **Commonly reported bugs** - Events disappearing from past months - Time zone issues when traveling - Inability to edit event details **Most requested features** - Add more color options - Implement landscape mode - Allow disabling of irrelevant holidays - Add support for Apple Watch - Improve event editing functionality - Retain past event history ## Newest reviews (16 of 122) ### 3/5 — Long time user but buggy now *2026-08-27, version 2.2.1* Oh, I’ve enjoyed using this for a long time. Recently though I found that I can’t open links from event details and sometimes I can’t add alerts either. It’s gotten a little buggier. ### 4/5 — Please bring back custom alert times *2026-08-25, version 2.2.1* Really like this app and have used it for years. But I wish you would bring back the option to set a custom alert time for individual events. I used that so often depending on the event and the timing of it. The standard ones now do not always meet my needs. I hope that will come back! ### 4/5 — Needed *2026-06-02, version 2.0.0* Appointment Sharing, critical to be able to share calendar appts with others! ### 3/5 — Days are wrong *2026-05-17, version 1.9.3* When I click on the grid for Monday, it comes up as Tuesday, so not great. Plus you can’t colour code it’s quite a basic calendar. ### 2/5 — Stopped accepting events *2026-04-18, version 1.9.2* Worked well for years, but now it won’t retain any events that I enter. ### 2/5 — Good when it works *2026-02-25, version 1.9.2* I’ve used this app for years it recently stopped loading my events and I have lost all of my content. I have trouble shooted all possible ways there are with no success. Do not recommend. ### 5/5 — On time *2026-01-03, version 1.9.2* I like being reminded of appointments and events. ### 5/5 — Go-To Calendar *2025-12-31, version 1.9.2* Even though I have an iPhone calendar I prefer this one. I used it when I had an android and refused to give it up when I switched phones. It’s visually appealing and easy to use. ### 5/5 — Color coding options *2025-12-31, version 1.9.2* Love this app but wish we had more than 2 options for color highlighting entries. ### 5/5 — Thank you *2025-12-31, version 1.9.2* Very great-full for this calendar , ### 5/5 — Like the Calender, but… *2025-12-30, version 1.9.2* I have been using this calendar for several years and really like it compared to the one that comes on the iPhone. Just recently I have started getting smutty pictures on the bottom advertisement. Why do you allow advertising such as this with your calendar? Even though they are very tiny, what an embarrassment to have this on my phone! ### 2/5 — UPR *2025-11-11, version 1.9.1* Regular ### 3/5 — dark mode is terrible *2025-11-03, version 1.9.1* half of the weeks are dark, half of them are still white. other than that, it's your basic calendar ### 5/5 — So essential *2025-05-30, version 1.9.1* I’m enjoying the calendar very much ### 5/5 — Great calendar, even compared to Google calendar *2025-03-23, version 1.9.1* One of the best calendar schedulers I’ve had I like seeing the entire month at a time and can actually see the words and not little dots ### 4/5 — dark/light mode problems *2025-02-25, version 1.9.1* when it switches from dark to light mode, half the lines remain black and the other half are white ... it does it visa versa as well ## Most critical reviews (10 lowest-rated) ### 1/5 — eh .. *2026-02-24, version 1.9.2* get rid if the f'n temu bullshlt ads, it looks like porn. half my screen is in dark mode and the other half is light .. idiots running this app ### 1/5 — This disgusting app. *2026-01-19, version 1.9.2* I got this app something like a half hour ago, and closed it to go do other stuff. I reopened it just now to find an add across the bottom of my screen, with little difficulty I got rid of it and seconds later another add popped up, one that I could not remove. This add featured nude women. You (the developer) made me to sin when I looked at those pictures. I mean, how can you look at such disgusting, gut wrenching abominations, much less put them on an add for the public to see?!? Please, please repent.🙏🏼🙏🏼 I wish I could change your mind, I wish I could make you turn your life around, seeing what shall befall the sinner after he dies, but I cannot. I really wish I could reason with you face to face, then I might be able to make you understand. 😔 I wish there was something I could do for you, as I am deeply distressed for you, having been in that miry pit myself once. But know that there is yet help in God, he sent his only begotten son on this earth to die for us, because he loved us so. There is an eternal crown of glory awaiting the arrival of those who accepted Jesus as their lord and savior. Would you not rather repent and receive that unfading crown of glory, rather than live a too short lifetime enjoying the lusts of the flesh, just to be damned eternally to torment in hell? It would be so easy to just repent, and not have to worry about when you’ll die, knowing that an unfading crown of glory awaits your obtaining. Thus I beseech you to reconsider the path you have chosen in life, and put those vile things away from you. “In those days it will come to pass that whoever calls upon the name of the LORD will be saved.” -The last verse of the last chapter of the book of Joel. ### 1/5 — Lost all the reminders! TWICE! *2025-06-23, version 1.9.1* I lost all my reminders and dates saved, first after an IPhone IOS update. Reached out to Customer Service, no reply. Started from scratch and made a bunch of new reminders, all of which disappeared again out of the blue. Not going to use this app again ### 1/5 — Alerts don't work *2025-01-26, version 1.9.1* The alerts do not go off as set! ### 1/5 — Bro Oxford *2025-01-03, version 1.9* I don’t like the format. The previous one was better ### 1/5 — Antisemitic *2023-12-24, version 1.8.1* This app removed all the Jewish holidays ### 1/5 — Lost my entire calendar *2023-12-22, version 1.8.1* Not sure what happened but my calendar blanked out. I lost every appointment , birthday, event, everything. ### 1/5 — Everything wiped *2023-12-10, version 1.7* All my events are wiped and I can’t view new events I make so there’s no sense in keeping it. The new update screwed it all up. I even tried what they told another reviewer to change dark mode into light mode and it still made no difference so obviously they don’t know how to fix it. Don’t waste your time putting important info in the app. Would give stars for the headache ### 1/5 — Very upset *2023-11-27, version 1.7* This new update wiped my whole calendar clean of important dates. I have to now figure out what is going on and when. I am extremely upset! I lost alot of very important information! Ugh!!!!! ### 1/5 — All Entries Gone After Update! *2023-11-26, version 1.7* Worked fine for years until last update. Now ALL entries in calendar are completely gone. App is worthless until it is fixed. ## Most praised reviews (10 highest-rated) ### 5/5 — Not good *2026-07-23, version 2.2.1* Was really good till the last update. It wiped out my entire calendar so now I have to start all over again. Never updating it again ### 5/5 — Best *2026-06-21, version 2.2.1* This is the best calendar for me. Easy to use. Like the colors available to use for family and events. You can keep it easy or add additional. ### 5/5 — calendar *2026-06-18, version 2.2.1* the best calendar app ever! ### 5/5 — calendar *2026-06-11, version 2.1.0* the best calendar app! better than iPhone! ### 5/5 — My go to phone calendar *2026-06-10, version 2.0.3* I have been using this calendar for years and never let me down. The format works better for my viewing for schedules. ### 5/5 — LOVE!!!!!! *2026-06-04, version 2.0.2* I love my calendar! It’s so easy & has so many options to personalize!!!! ### 5/5 — The best ever *2026-06-03, version 2.0.0* This calendar is all I need. Very organized and keeps me on track. ### 5/5 — Great *2026-06-02, version 2.0.0* This is a great calendar app and now with native iPad support , it is very very hard to beat, it is easy to see my events and stable and just great, the last thing it needs is to show my reminders!!!! ### 5/5 — Easy to use *2026-05-21, version 1.9.4* This is an easy app to understand and use. It allows two notifications one to be the primary notification, the second a backup. ### 5/5 — Gotta have *2026-05-17, version 1.9.3* Like this calendar. Like the “event line” and multiple “event lines”. when you check an appointment, it shows the time. Which it had colors so you could differentiate between things. Definitely recommend this calendar. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*