5/5 rating based on 214 reviews. Read all reviews for Zero: Fasting & Health Tracker for iPhone.
Zero: Fasting & Health Tracker is free iOS app published by Zero Longevity Science, Inc.
GVinHI
I exercise a lot, like probably everyone here. But I also don’t have a lot of time for it so I break up my exercises throughout the day and night. Here is where the trouble is: when I log my first workout, the app reflects a higher efficiency of fasting. Great. But subsequent logged exercises start taking away that efficiency. So I’ll go from having a 30m more efficient fast with no exercise, to a four hour less efficient fast with logging three thirty minute workouts. It makes no sense, like a variable has been flipped to negative or something. I like the app and will continue to use it, but the personalized zones functionality is not currently useful or intelligible for me.
michaelborland
The app seemed nice at first. Then it continued to flood me with “do this, and do that” constantly.
JABeastbay
This is not user friendly. There’s nothing free about it, no point to the free part. Useless. I deleted it 15 after set up. I can set the timer on my phone for free.
Will Power Galore
I am very satisfied with the Zero app. It has served me well and will continue to do so as I monitor my weight loss and keep my ketosis in the nutritional zone! I have been very successful at losing literally 35+ pounds in just 5-weeks with some discipline, exercise, and intermittent fasting. And, a whole lot of will power especially after being hypnotized at the very start of this weight loss journey. More to come! Jerry B
annnnnnnnnnnnnnnnnnnz
Just after a few hours on this app I canceled it. This is not an easy user friendly program. It honestly makes no sense. I understand fasting but this app does nothing for you but take your money. I tried to log food what you put in is all it does. It shows nothing. Total rip off!
LovieLava
The plus version does not seem much different. The ketone and glucose readings I log are not changing the “zone” I should be in based on those readings.
Delo's Mom
This app was great for the first few weeks I used it but recently it stopped recording some fast/break fasts. Sometimes I go to start my fast and realize the clock never saved my break fast from the morning. Please fix this! Great app but this is very annoying.