# Ovulation Calculator Fertile Tracker & Calendar OC — user reviews > 265 indexed App Store user reviews of Ovulation Calculator Fertile Tracker & Calendar OC by Ovulation Calculator Pty Ltd, rated 4.60/5 from 5,867 ratings. - Source: https://appshunter.io/ios/app/ovulation-calculator-fertile-tracker-and-calendar-oc/id1010506484/reviews - App overview in markdown: https://appshunter.io/ios/app/ovulation-calculator-fertile-tracker-and-calendar-oc/id1010506484.md - Rating breakdown: 5★ 4,267 · 4★ 1,188 · 3★ 290 · 2★ 70 · 1★ 52 ## What do users think of Ovulation Calculator Fertile Tracker & Calendar OC? Overall sentiment: positive **Pros** - 🚀 Accurate predictions - 👍 Easy to use - 💡 Helpful information and tips - 🚀 Reliable tracking - 👍 Informative - 🚀 Worked first try - 👍 Comprehensive - 👍 Detailed - 🚀 Helped get pregnant - 👍 Great resource **Cons** - 🐛 Crashes/glitches - 🐛 Inaccurate predictions - 🐛 Issues logging data - 🐛 Difficult to edit information - 🐛 Compatibility issues **Commonly reported bugs** - Crashes when trying to use app - Inaccurate ovulation predictions - Unable to log period end date **Most requested features** - Option to add irregular periods - Ability to log period end date - Sharing/syncing with partner - Ability to add photos/test results ## Newest reviews (17 of 265) ### 4/5 — The questions make sense *2025-12-11, version 1.5.1* I like the concept ### 5/5 — Easy to use and accurate *2025-01-26, version 1.5.1* This is one of many apps I’ve used over the years. This one has the easiest to read calendar telling you your fertile week and peak predictions. You can load your LH surge and other symptoms as well as days you baby dance. I’ve now gotten pregnant 3 times using this app. It updates and tracks cycle length the more you use it and maintains history for many years. I also like that you don’t need to pay premium plan price to get relevant easy to read personalized information. I also like that you aren’t bombarded with ads all the time or asked to join a paid plan constantly like other apps. Highly recommend. ### 5/5 — Yessss!! *2025-01-24, version 1.5.1* Love love love this app it’s helped me threw to pregnancies very accurate very helpful ### 5/5 — Pregnant *2025-01-15, version 1.5.1* This app is amazing right about my first child. But I was the ovulation was wrong this time but still happy ### 3/5 — Any support?? *2024-11-28, version 1.5.1* I used to love this app! I used it to help plan my pregnancies (or at least know when I’d be fertile😂). I was ready to start using it again, but it looks like it hasn’t been updated in a long time. Wondering if there is any plan to, because I’d love to use it again! ### 4/5 — Great resource *2024-11-03, version 1.5.1* This is great for tracking periods and has lots of features if you’re trying to conceive. Really helpful articles linked in too which you can delve into as much or as little as you like. Some of the period tracking isn’t as intuitive as other apps but the pros outweigh the cons in my opinion ### 5/5 — This app helped me! *2024-08-22, version 1.5.1* This app helped me figure out my fertile days and I’m so grateful for it because I am 3 months pregnant now!! I’m so so thankful to this app! If you are trying to get pregnant and have a hard time like I did I recommend this app 1000%! You won’t regret it❤️ ### 5/5 — Accurate - got me pregnant twice! *2024-08-18, version 1.5.1* This is the most accurate app I’ve ever used to track my cycle. It’s very insightful. I have PCOS so never had a regular cycle and this app is the only one that has managed to accurately track it. When I first started using the app, it helped me to get pregnant within the first few months. Unfortunately I had a miscarriage, but when I was ready to try again, the app helped me to get pregnant in 2 months! 1000% recommend ladies! ### 5/5 — 100% Legit *2024-06-07, version 1.5.1* I had a baby girl. She’s 6 now. Precisely on the dates calculated. For real. No lie. No gimmick. I am not being paid for promo. This app not only tracks ovulation but it tracks everything daily to calculate more efficiently when to conceive… or not 😉. 🫶 ### 3/5 — Ok App *2024-04-12, version 1.5.1* App was ok but not as accurate as I thought. Some of the estimated dates were completely off so I had to use another app to compare. May use again in the future. ### 5/5 — Pregnant! *2024-03-08, version 1.5.1* Got pregnant the first month we tried using this app!! ### 5/5 — So accurate *2024-01-01, version 1.5.1* This app works I love it it’s helped me get pregnant twice one first occasions thank you x ### 5/5 — The best ovulation app ever created!!! *2023-12-30, version 1.5.1* I have been using this app over 5 years. I even used it to create my son 10 years ago and it was accurate. ### 5/5 — Goodluck! *2023-12-13, version 1.5.1* We’ve been trying for baby #2 for 5 months and no luck… I’ve used this app for just ONE MONTH and we are pregnant! Goodluck to anyone trying! ### 5/5 — Great App! *2023-10-22, version 1.5.1* After being on contraception for 15 years I had no idea when my period was or how long my cycle was etc. I downloaded this app after coming off of contraception and it was so helpful in understand what my body was doing and when. Through following this app, I was able to conceive in my fertile window and I couldn’t be happier. Thank you for this app! ### 5/5 — Love it *2023-10-20, version 1.5.1* Really easy to use and great for helping you get pregnant highly recommend ### 2/5 — Not working *2023-10-11, version 1.5.1* The app is not working these days properly. I am not able to log any data. As soon as I click add button the automatically closes. I am using i phone and updated my phone and the app also. The problem still prevails. ## Most critical reviews (10 lowest-rated) ### 1/5 — Crashes all the time *2025-01-27, version 1.5.1* The data accuracy is good but it crashes all the time. Is it compatible with latest iOS? ### 1/5 — App not responding *2023-12-01, version 1.5.1* App is not working properly.even I am not able to login ### 1/5 — 5 Stars. Works great for ttc *2023-09-26, version 1.5.1* I’ve been using this app for over 5 years !!!! Log all your cycles to get the most accurate data. I have 2 girls conceived from using this app! I love it, we’ll be trying for #3 soon. Don’t hesitate to give this a try ### 1/5 — Glitches *2023-05-17, version 1.5.1* The app works for the first couple of days before it starts to glitch. It will close out every time when the app is trying to be used. ### 1/5 — Inaccurate *2023-04-14, version 1.5.1* I found the app very inaccurate and it has been a huge disappointment for me. I was obsessed with the fertility window, which eventually was all wrong. Clearblue ovulation tests have been much more accurate. I’m not relying on the app at all now. ### 1/5 — No help *2023-02-20, version 1.5.1* Having this app has made TTC so much more stressful. Checking cervix’s, temperature checks are something that didn’t seem to work for us and stressed me out more than anything else but this app keeps prompting you to input something. It’s also all very complicated. Stick to the simpler ones ### 1/5 — Not intuitive *2021-03-01, version 1.5.1* Spent ages trying to work out how to log the end of a period - need make this more intuitive! At the moment I have sent an email asking how to do this and it takes them a week to reply! Eventually worked it out. it is swipe-right why??? All other apps use swipe-left for this kind of interaction - as I said needs improving to be more intuitive ### 1/5 — Beware the shettles method *2021-01-14, version 1.5.1* This app seems to support the shettles method. I delete this app as I didn’t like that they had on the calendar, conceiving on certain days would result in a particular gender. When you truly want a baby to be a surprise it really messes with you head.... even though the shettles method has nooo evidence to support it other than coincidental statistics that would result with any claim... since boys and girls are 50/50 chance Look it was just annoying as all hell to have out dated theories on this ‘science’ based app ### 1/5 — Option to add irregular periods. *2020-12-11, version 1.5.1* I’ve used this app for several years and luv it until recently (a couple of months ago) when my period became irregular. Going back to Sep 4th I had my regular period which I logged and again on Sep 21st it came again but this time lasted for 15days (ended Oct 6th) and for some reason, the APP won’t let me add the days because it tells me the day from the last period to the one am trying to log is too short which is 17 days apart but I think there should be a way to edit that. It should be able to let you add days shorter than the normal 21 to 28 day cycle. Now I haven’t been able to log anything Co’s I haven’t even had another period since Oct 6th and NO, am not pregnant. Seen the GYN plus my primary care physician since all this started and this is the first time ever it’s happening to me. PS edit the app in such a way that, one can add any days that their periods are regular or irregular. As of now, the app won’t let u. ### 2/5 — Tracker *2025-07-29, version 1.5.1* Really helpful and accurate ## Most praised reviews (10 highest-rated) ### 5/5 — Accurate and free *2026-09-11, version 1.5.1* Used for both my pregnancies. I always recommend it. Thank you to the people that created this app. ### 5/5 — AMA *2026-05-17, version 1.5.1* This app is very very a curate ### 5/5 — I liked the application! *2026-04-26, version 1.5.1* I liked the application and his adaption regarding OPK. ### 5/5 — Amazing *2025-10-10, version 1.5.1* I have been trying to conceive for the last three years after I had my son I’m going to be 40 next week and I thought I could no longer have any more kids because I was not getting pregnant. I decided to download this app and within the first month of using this appI found out I was pregnant literally 8 October and I just started using this app September 9 I logged in my last period. Truly I am still in shock. I have to take multiple pregnancy test and go to a clinic to find out if it was true or not and I am just ecstatic. I have a 20-year-old a 19-year-old a four-year-old and now my last baby, I wanted my son to have a sibling close to age to play with like my oldest two daughters. This app is truly a godsend. ### 5/5 — Brilliant *2025-09-02, version 1.5.1* Got pregnant 2 times with this app it’s amazing ### 5/5 — 2 times a charm ! *2025-07-13, version 1.5.1* 2nd time I’ve gotten pregnant using this app!!! ### 5/5 — Most accurate app *2025-03-27, version 1.5.1* I’ve been using this app since wayyy before it was a app and was only a website lol I’ve been using this app since I was 13 years old and I’m 26 years old now . It always knows when my cycle is going to be off before I realize and has never been off about my ovulation dates . I’ve been able to get pregant due to the accuracy of this app . I have my oldest daughter who just started her cycle now using this app . I definitely recommend this app to anyone ### 5/5 — Highly recommended *2025-03-25, version 1.5.1* Over the moon. Great app, after reading reviews on this app I decided to give it a go as myself and new partner (now 7yrs together) decided to have a child together, after a previous loss 🥲 I still decided to use it to track periods and ovulation. Prior to taking pre-vitamins and logging daily and only using the app for a month WE R PREGNANT. (Nearly 3yrs ago) We’re shocked at how quick we conceived, again to finding out we expecting again I am over the moon. Highly recommend using this app ### 5/5 — Used this for 5 years! *2025-02-26, version 1.5.1* This app works really well. It helps you learn about female and male fertility and has accurate predictive calculations for both periods and ovulation. Highly recommend. ### 5/5 — Reliable *2025-02-06, version 1.5.1* This app is very a helpful tool 5 stars --- *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 2026-09-12.*