Reviews for Zero - Intermittent Fasting

Update 7/7/24: Uninstalled. Issue not resolved, and developer response is not helpful. You know the issue is widespread, I shouldn't have to email you. When it works, it's handy. Unfortunately, most of the time it won't load, just keeps spinning and spinning. I have to wait until the next day to edit the start time, for example. I also can't go back and add a fast if I forgot to push start - or at least I can't get it operational long enough to find how to do that.

Ok so I love this app and have been using it everyday for the the last 5+ months. Plus is TOO expensive and not worth it. I like the fasting zone feature. But that's it. So many of us don't use the education section at all. If I want the fasting zone feature, i would also need to purchase access to articles I will never use. Maybe add tiers of membership and a lite version for people who only want the fasting features without the educational part? And Also zones are free in other apps.

The only other thing I wish this app did was let you keep a log as to why you cut your fast short or extended your fast longer than your normal fasting period. And also show the stages of your fasting (like what your body is doing in the time you are fasting.) The app has slowed down I'm assuming since the last update. It doesn't load as fast as it did when I first got it.

I like the app and tried the zero plus trial. I logged in food to help with my journey. Later I did subscribe to the Zero plus however, now when I wish to log food it opens a window and immediately closes it. This was one of the reasons I joined. Reaching someone to help is nearly impossible. All the replies say is that I logged in to the wrong account. That is not the case. I gave it a 3 and that is too much. So disappointing.

This was a great app 'til it got accidentally deleted off my Android phone. I downloaded it again & now it gives me no prompt to sign in. It only gives me prompts to create a new account. I don't want to create a new account, as I have almost one year of daily fasts logged on this app. It appears this is only a problem on Android. My friend has an iPhone & just for the heck of it, she deleted & then reinstalled the app & was able to sign in with her email again,no problem. Please fix for Android

The app keeps glitching horribly. Tons of little "ghost fasts" keep appearing, ie it logs a random fast that I never did (for a stupid amount of time - some of them are 1877h)! I can't delete them and they break my fasting streak somehow. Oh, and for added frustration, when I try to delete them they just get longer. This is driving me insane.

I find strange that ketones levels are recorded only once a day and without a time of day (or time of fast) attached to them. it makes sense for a day long fast, which is likely the least frequent type of fast. for hours long fasts it would be useful to test glucose and ketones every few hours to understand how they change wrt to start of fast and start of day. probably won't be used every day, but once in a while to get a detailed understanding. I also cant find a way to sync with google fit

Used this app for aver a year and I enjoyed it. I was excited when they were launching the premium version up until I realized you had to take out a small loan to pay for this apps annual membership.. Why make the cost so high for a relatively straightforward application? IMO The app should remain simple, easy to use, and priced reasonably if you're going to insist on keeping functions users can't access visible. The customer either unistalls or gives in. Sadly I had to choose the former.

I love this app. I have been using it for over a year now and I think it's the best one out there. The app has a reminder to let me know when it's time to start fasting and it allows me to edit my fasting time. For example, if I started fasting at 9pm but forgot to enter it then remembered at 10pm, I can go back and edit my starting time. The app also has goal badges for motivation. When you surpass a certain number of fasts you receive a badge. I will always use this app. Love it.

I do wish you offered more things. i would like to see an option that connects to fitbit or some weight app, like my fitness pal. i dont record my weight on my email. i would like to see an option for measurements as well. maybe a place you can add a journal to see how you feel that day? theres just so much more you could add. id pay for the app too. one time payment. other then that. it is a great app for basics.

Really enjoyed all the free perks of the app before they switched it, took everything away, and made people start paying for the things we got for free for years. Thanks for the response; however, I know what plus does as the app itself, before you started charging everyone, did the same things. At minimum it was giving fasting zone information which was extremely helpful. I've switched to a new app called 'Fasting Tracker' that does what this app used to do for free.

Have been using paid version. As of today, cannot use the app at all: "This version of Zero is no longer supported. Please update to the latest version to continue using the app." I uninstalled/reinstalled, cleared cache - no change. It would be sad to lost quite a bit of data I've accumulated over the years. Hope the issue is fixed. Update: the bug was fixed

I love that the timer can switch between time passed and time left, the completion wheel showing how far you've gone, and the % that you've completed is awesome. But, it won't let me save a fast that's past what it was set as :/ 13 hours + 45 minutes? no, no, no, better edit that back down to 13 hours. why??? so, I guess just set your timers past when you intend to end or it won't record that time. If I'm somehow using it wrong, I'd love to be educated.

Not really user friendly. When you finish a fast, it immediately starts a clock telling you how long it's been since your last fast. How about giving me a second to celebrate? Instead, I have to search for evidence that I even completed a fast, and it's just stupid lines on a calendar once you find it. This will help you keep track of fasts, but it's not worth a subscription. Other fasting apps (even ones that are now defunct) have a lot more information about various zones you're in, etc.

I want to love this app. This app has everything I've ever wanted in a food diary app. But I'm having one major issue that I just cannot abide by. Logging food is abysmal! I can't take a picture in the app because it never loads. I can't type my description of the food too fast, or else the app will lag and the letters get jumbled up. The app says I've logged 10 meals, I haven't, it's just buggy as all get out 🙄. This app needs an overhaul quick, fast and in a hurry

Pretty buggy. It does what it needs to do, but for certain prompts, I have to click through 2-3 times for it to go through. Fitbit sync doesn't really work, and the function to add activity isn't working. There's no way the premium version is worth $10 a month; think of the value that other subscriptions offer for less. Better, free apps exist.

I like the interface, but there's several things that seem to be broken in the Free version. For example, streaks & milestones are not being earned or incremented. Also, the week view for the Total Fasting Hours chart is not accurate. It has not shown anything since 10/28 and the hours that are displayed for that day do not even reflect what was recorded for the fast itself. -- If you don't care about any of that stuff and just want to track your fast each day, the Today & Calendar views work.

Loved this app at first, but features began to be frozen after a month. After starting a fast, I couldn't adjust fast times and goals even after force stopping app and deleting cache. I can't delete incorrect fasts after this, too. i checked for an update, but my app is most up to date so I don't know what's wrong. Will not be reinstalling.

I've been using this app for about 9months and have enjoyed it very much. However the last 3-4 weeks I haven't been able to edit my fasting goal or delete inaccurate fasts. This is frustrating because it prevents my challenges from being met & having an accurate history. I purchased the annual subscription & feel like it's not worth it. I have an open ticket with support which they confirmed its a known issue & are working to fix it but we're going on 3-4 weeks without a fix.

So far too many glitches. App does not sync up on multiple devices. Requires forced stop to get the second device to acknowledge the first. edit 9/22/25 please please stop changing things. I had a long period of time where things worked as they were supposed to in your most recent update. just really screwed all that up. I don't know why you decided you needed the flashing times, but since that came about I can't edit the time with the when the fast stopped. please just stop screwing things up