# DaysyDay Cycle, Period Tracker — user reviews > 155 indexed App Store user reviews of DaysyDay Cycle, Period Tracker by Valley Electronics, rated 3.50/5 from 102 ratings. - Source: https://appshunter.io/ios/app/daysyday-cycle-period-tracker/id1533071047/reviews - App overview in markdown: https://appshunter.io/ios/app/daysyday-cycle-period-tracker/id1533071047.md - Rating breakdown: 5★ 48 · 4★ 11 · 3★ 10 · 2★ 7 · 1★ 26 ## What do users think of DaysyDay Cycle, Period Tracker? Overall sentiment: neutral **Pros** - 💗 Excellent method - 🤩 Great investment - 👍 Easy to use - 🙌 Intuitive and user-friendly - 🔍 Helps understand cycles - 📊 Detailed data tracking - 🔄 Seamless sync with app **Cons** - 🔧 Synchronization issues - 🔌 Connectivity problems - 🔍 Limited tracking options - 🕰️ Inconvenient manual sync - 🤒 Inaccurate temperature readings - 🤷‍♀️ Unreliable predictions - 💸 Expensive for limited features **Commonly reported bugs** - App crashes frequently - Sync fails or gets interrupted - Calendar and data display issues - Compatibility problems with newer devices **Most requested features** - Add LH test tracking - Allow more historical period logging - Integrate with Apple Health - Provide more cycle insights and analysis - Improve UI and data visualization ## Newest reviews (11 of 155) ### 4/5 — Great app and device, but lacks things other trackers have on the market *2026-05-06, version 1.5.1* This app is great and so is the device, but it really lacks insights and stats like other apps (Lively) have, even on their free plans. I’d appreciate more detailed insights and maybe a UI refresh? It’s sorta plain. ### 2/5 — Hardly has the bare minimum *2025-10-29* Unfortunately the app has fewer features than any period tracking app. It would be amazing if it clearly outlined your pre ovulatory temp range, gave you the average and compared with your post ovulatory to see that shift and make sure your temp change is high enough to confirm ovulation/ tell the state of your hormonal health. Instead, you have to calculate the avg yourself and do the math. For the ammount of $ you pay, the app should offer a bit more. ### 4/5 — Gute und übersichtliche App *2025-10-16, version 1.5.1* Liebes Produktteam, ich bin mit eurer App sehr zufrieden, hätte jedoch einen Verbesserungsvorschlag: in der Übersicht, wo man den Temperaturverlauf sieht als auch in der Tagesübersicht, werden mir Tag und Monat angezeigt, aber nicht das Jahr, in dem ich mich befinde. Ich habe mehrmals schon weiter zurück gescrollt und es ist sehr unübersichtlich zu sehen, in welchem Jahr man sich befindet. Es wäre toll, wenn ihr das ändern könntet. Danke und weiter so :) ### 3/5 — weird UI spacing with new phone *2025-08-27, version 1.5.1* great app but got a new phone and the menu bar at the bottom is really close to the home screen bar thing which makes the buttons a lil hard to press ### 3/5 — Störungen und Unflexibilität *2025-05-25, version 1.5.1* Momentan wird der letzte Zyklus einfach nicht mehr angezeigt, der Mai ist grau hinterlegt und es kann nichts eingetragen werden. Zudem werden oft die Server gewartet und währenddessen ist eine Pflege der eigenen Daten nicht möglich. Wenn man dann noch die drei Tage „Karenzzeit“ verpasst hat, hat man Pech gehabt und der Zyklus mit Periode ist nicht korrekt hinterlegt. Dann kann ich auch wieder einen Papierkalender führen und mit eigenem Basalthermometer messen. Ich bin seit 2021 Nutzerin und war eigentlich immer zufrieden bis jetzt. ### 3/5 — Great! Could be even better! *2025-02-11, version 1.5.1* I’m excited to use it to track ovulation, but I’m just 1-2 cycles in. A few improvements after a bit of use would be syncing to Apple’s Health App, as I used to track all my stuff there. Another main one is that I have to click twice to register temp, and take my phone out and double click again to sync my hardware every single time. I wished there was a way I didn’t have to do so much of that, maybe have it sync as the temperature is registered. ### 2/5 — A bit basic *2025-01-23, version 1.5.1* I’ve been using the app for 4 cycles now and I find the visualisation and functionality of the BBT chart a bit basic: we can’t isolate one cycle for example to have a clearer look at the curve. It would be good to be able to export the chart of each cycle to share with a doctor as well. ### 3/5 — Best tracker so far but does not take correct temp *2025-01-07* This is the best tracker for a real menstruation and ovulation tracking. It’s the only one that actually considers the rest of the female population that does not run on precisely 27 days. Now the issue is the temperature reading is always lower than what my other four thermometers read. So if you’re trying to track your actual body temperature this may not be accurate, but it does give you a consistent temperatures even if it is low. And make sure that you are taking your temperature correctly because you’re not allowed to take it more than once. So if you don’t put it under your tongue correctly, you will have a bad reading and it will mess up their predictions **Developer response:** Thank you for your review! Daysy is tracking your temperature changes over time (compared only to values collected by its own sensor) and is not designed nor calibrated as a "fever" thermometer, so the values may be a bit different than an over the counter thermometer. Also, Daysy's algorithm is designed to disregard the occasional "outlier" reading and will use its knowledge of your cycle to calculate the fertility status for that day, always erring on the side of caution. Please feel free to reach out to our support team with any questions or to discuss in more detail - info@usa.daysy.me ### 4/5 — Optimierung der Nachtragung der Periode *2025-01-06, version 1.5.1* Es wäre hilfreich wenn man seine Periode auch nach 3Tagen rückwirkend eintragen könnte. War im Kurzurlaub und hatte es vergessen. Ein Tag kann ich jetzt nicht nachträglich eintragen. Finde ich persönlich blöd. Es wäre auch hilfreich wenn man das Gerät bei falscher Eingabe schneller neu starten könnte. ### 4/5 — Good but can be great! *2024-12-11* I wished the app would provide more information on what is going on in that day in particular. As I transition from red to yellow and green, it would be great if there was a little AI or smart box that gave you tips and info for that day and upcoming so woman can prepare mentally and emotionally. But over all it does the job! I’ve been using it for about 9 months now and my fiancé and I love it!! Truly recommend the product!!! ### 1/5 — No longer allows you to synchronise *2024-12-11, version 1.5.1* Constantly get a ‘synchronisation interrupted’ message so I have not been able to update for weeks now - what’s changed? ## Most critical reviews (10 lowest-rated) ### 1/5 — Tracker *2026-05-26, version 1.5.1* After using the daysy for over 3 years and a consistent cycle every month - though days do vary between 32 -35, it still cannot predict my ovulation until after my bleed happens. ### 1/5 — Easily breaks *2025-12-25, version 1.5.1* This is device is very expensive and yet the end of the temperature gage broke off so now this is useless to me as it won’t read a temp. I only had this a little over a year. ### 1/5 — Really not great for cycle tracking *2025-11-22* I’ve had this product for over a year now, and when you’re on top of it great. For real life and when you fall off and restart it’s really annoying as it doesn’t let you back date log periods to map out your cycle so far. Honestly really not happy with the product in general, it’s slow to read, app isn’t flexible for logging, and it’s pretty pricey for what it is. ### 1/5 — Not for perimenopause *2025-11-04, version 1.5.1* It’s been nearly 6 months and still has no clue about my cycle. I know myself better than this device. Has me fertile over 15 days. Prediction for period has not been correct. Don’t waste your money ### 1/5 — Dislike *2025-10-14, version 1.5.1* Honestly, for as much as it was this app is not super easy to use and sometimes does not log things even thought I logged it. Wish I would have returned it ### 1/5 — Doesn’t measure temp *2025-09-17, version 1.5.1* Feeling scammed. It doesn’t give a temp reading. Been trying to contact Daysy for months. No reply. Paid over $500 for a broken product. ### 1/5 — Synchronisation errors *2025-06-25, version 1.5.1* Daysy won't sync with iPhone 13 Pros running 18.4.1 iOS. Even with deleting the app and redownoading it just says 'synchronisation interrupted' constantly Update: no I don't have 1.0 I have 2.0 and it has Bluetooth. A previous Samsung device I used synced perfectly with this Daysy device ### 1/5 — La ayuda de soporte técnico es mala *2025-06-18, version 1.5.1* En el momento llevo 40 días de fluctuación de mi monitor y he enviado correos y nunca me han contestado ### 1/5 — Synchronisation errors *2025-05-27, version 1.5.1* Daysy won't sync with iPhone 13 Pros running 18.4.1 iOS. Even with deleting the app and redownoading it just says 'synchronisation interrupted' constantly ### 1/5 — App needs updated *2025-04-04, version 1.5.1* App is not user friendly. ## Most praised reviews (10 highest-rated) ### 5/5 — Accurate *2026-03-29, version 1.5.1* Love this app! ### 5/5 — I love IT *2025-10-26, version 1.5.1* Es un método natural, que no va en contra de mis creencias y supremamente efectivo, para aplazar el tener un bebé o abrirse a la vida, es maravilloso, puedo además conocer mis ciclos u comportamiento hormonal ### 5/5 — Excellent *2025-07-19* I have used Daysy for almost a decade. It is top-notch, and customer service is always speedy and very helpful. The Bluetooth feature to sync Daysy to the app is quick and easy, but I also love that you don’t have to rely on the app if you chose not to, as the device itself gives your fertility status for the day. I definitely recommend Daysy and also the Daysy Day app. **Developer response:** Thanks so much for your review! We love our Daysy family and our support team is always happy to help. ### 5/5 — Perfecte app *2025-05-07, version 1.5.1* Daysy doet perfect haar werk ### 5/5 — Great investment *2025-05-01, version 1.5.1* Getting Daysy is a great investment to make. It is so helpful and healthy and looking at all the contraception methods on the market this is the best option. Plus when you are ready to have a child it helps as well. However, if it’s God’s will for you to have a child or not to have a child, He will determine that no matter of the contraception method you choose. ### 5/5 — Język *2025-03-19, version 1.5.1* Jestem Dopiero dopiero na początku drogi z tym urządzeniem ale mam pytanie czy planujecie aplikacje rozbudować o inne języki Świata pytam o mój Język Polski 🇵🇱 nie ukrywam że w tak drogim urządzeniu i w tych czasach powinno być opcja wyboru języka. ### 5/5 — Wunderbar und einfach *2025-01-18, version 1.5.1* Vielen Dank für die Entwicklung der Daysy. Es macht Spaß und ist angenehm in der Bedienung. Einen kleinen Daysy-Wunsch hätte ich allerdings: eine längere Bearbeitung der Menstruation. 3 Tage rückwirkend reicht mir manchmal nicht aus, um bei unregelmäßigen Zyklen eine Korrektur vorzunehmen, wenn es doch bloß eine Zwischenblutung war. ### 5/5 — Unkompliziert *2025-01-01, version 1.5.1* Einfache Handhabung und übersichtlich ### 5/5 — Love this app and period tracker *2024-12-21, version 1.5.1* One word for this product. Amazing! Been using it for almost 6 years. ### 5/5 — Best fertility tool! *2024-09-10* I’ve been using Daysy for a few months & its been so easy to track my cycles. I Know more about my body now. Sometimes I miss quite a few measuring days and that gets a little annoying but the device it’s self and the app works great in my opinion. **Developer response:** Thank you, Nellyrod14! Please don't ever hesitate to reach out to us if you have any questions, info@usa.daysy.me :) --- *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 2026-09-01.*