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Zero: Intermittent Fasting

Zero Longevity Science, Inc. · Health & Fitness · United Kingdom store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card Google Play version →
Revenue a month, worldwide EST
$27.4K
Likely $9.1K to $82.3K
▼ 56.2% in 11 days
New ratings
Tracking
Daily counts start building from today
Rating
4.8 of 5
51.3K ratings in this store
Countries it ranks in
9
was 8 on Oct 15, 2026

Revenue

Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / YEAR · WORLDWIDE
$329.1K
Not ranked on Google Play in tracked countries
EST. LIFETIME DOWNLOADS
1.8M to 5.1M
Estimated from ratings count
WHERE IT EARNS · EST. / MONTH
  • Netherlands #100 Health & Fitness$8.4K · 31%
  • South Africa #19 Health & Fitness$8.4K · 30%
  • Ireland #72 Health & Fitness$4K · 15%
  • Poland #87 Health & Fitness$2.2K · 8%
  • Philippines #49 Health & Fitness$2K · 7%
  • Thailand #44 Health & Fitness$1.6K · 6%
  • Peru #58 Health & Fitness$835 · 3%
HOW SURE ARE WE
Small app: combines its grossing ranks with ratings growth (1610 new ratings a month on average since launch). Tested on 418 apps with verified revenue: typically off by about 2.6 times, so the range is wide. Countries we don't track (and Google Play in China, which doesn't exist) aren't included, and neither are ads or web payments. Gross revenue before store fees.
RATINGS
51.3K
AVG RATING
4.77
PRICE
Free
AGE
9.8y
LAST UPDATE
17d ago
VERSION
7.15.0
SIZE
195 MB
AGE RATING
17+

Last 29 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
29 / 29
COUNTRIES NOW
7 (was 2)
EST. REVENUE A MONTH, DAILY · BOTH STORES EST
Show daily values
Sep 24, 2026$76.5K a month
Sep 25, 2026$76.5K a month
Sep 26, 2026$76.5K a month
Sep 27, 2026$76.5K a month
Sep 28, 2026$76.4K a month
Sep 29, 2026$76.4K a month
Sep 30, 2026$76.4K a month
Oct 1, 2026$76.4K a month
Oct 2, 2026$76.4K a month
Oct 3, 2026$76.3K a month
Oct 4, 2026$76.3K a month
Oct 5, 2026$76.3K a month
Oct 6, 2026$76.3K a month
Oct 7, 2026$76.3K a month
Oct 8, 2026$76.2K a month
Oct 9, 2026$76.2K a month
Oct 10, 2026$76.2K a month
Oct 11, 2026$76.2K a month
Oct 12, 2026$76.2K a month
Oct 13, 2026$28.2K a month
Oct 14, 2026$302.7K a month
Oct 15, 2026$19K a month
Oct 16, 2026$5.5K a month
Oct 17, 2026$18.6K a month
Oct 18, 2026$9.9K a month
Oct 19, 2026$14.6K a month
Oct 20, 2026$22.9K a month
Oct 21, 2026$33.4K a month
Oct 22, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 24, 2026: #51 Health & Fitness · PH. Now: #11 Health & Fitness · PK.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
5 purchases listed
  • Zero Plus Subscription£67.99
  • Zero Plus Subscription£9.99
  • Zero Plus Subscription£60.99
  • Zero Plus Subscription£68.99
  • Zero Plus Subscription£89.99
Top in-app purchases as listed on the App Store, in local prices.
REVIEW MOMENTUM
8.8 reviews / week
  • Trendfalling
  • Recent reviews average1.9 stars
  • Recent 1 and 2 star share73%
From the latest 500 written reviews, covering 396 days. The store only returns this many, so this is the most recent slice.
RELEASE CADENCE
4 updates in 90 days
  • Typical gap between releases12 days
From the last 25 versions listed on the App Store.
RATING BREAKDOWN
51.3K ratings
5★85%
4★10%
3★3%
2★1%
1★1%

What users want

From the latest 500 reviews on the United Kingdom App Store, Sep 21, 2025 to Oct 21, 2026: 73% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS
Price and subscription50%

183 of the 1 and 2 star reviews.

★★★★★ will not allow me to say no to the free trial it's offering to use the app
★★★★★ I also wanted to pay for it only to be told the pricing is 80 a year when I went to cancel they said they will reduce to 37 for the next year.
★★★★★ Also multiple pop-ups pushing for subscription services.
Login and account problems20%

74 of the 1 and 2 star reviews.

★★★★★ After creating an account and answering all the questions your only option is to start their trial.
★★★★★ I went to login and there are so many questions now.
★★★★★ Now that this is a paid APP I want to delete my account but it won't let me.
Bugs, things not working13%

49 of the 1 and 2 star reviews.

★★★★★ However recently I started using it to track my protein intake It has an AI powered camera that does not work 70% of the time It also overstates your protein assumption by 30 to 40%.
★★★★★ Lots of bugs for example app cannot read touch screen and/or gestures input with any precision.
★★★★★ Don't recommend it because failing to plan is planning to fail.
Worse after an update13%

46 of the 1 and 2 star reviews.

★★★★★ This was my go-to fasting app for YEARS but recently they completely changed the UI and have made it virtually unusable for me now (everything is compact, harder to find and tap tiny buttons). Also multiple pop-ups…
★★★★★ TLDR: won't stop asking me to update my app when my phone old and I can't update my IOS.
★★★★★ The developer has invested in annoying and disrupting promos, rather than adding new challenges (which haven't seen an update since I joined over a year ago).
Lost data, sync, backup8%

28 of the 1 and 2 star reviews.

★★★★★ This app has gone from practically perfect when it started to absolutely controlled by greed and worthless to those who can't afford to give in to that greed.
★★★★★ I have since deleted the app
★★★★★ I'm not sure how to LOSE weight at 142 to get me to 250 as a LOSS, so I am concerned that it is going to give me a program for a weight GAIN, and not a loss at all.
Missing features7%

25 of the 1 and 2 star reviews.

★★★★★ No option other than zero plus.
★★★★★ There is no option to decline or select a free version.
★★★★★ There's no option to not opt in.
Limits, credits, locked features7%

24 of the 1 and 2 star reviews.

★★★★★ Hate apps that don't even let you check out how it is you have to pay for it to be able to use it and it's a monthly subscription.
★★★★★ Now you have to pay to simply loggg your fast!
★★★★★ The minute you open the app you have to pay to unlock.
Wrong or poor results4%

16 of the 1 and 2 star reviews.

★★★★★ The AI Calorie estimates through pictures are basically useless.
★★★★★ Makes the app pretty close to useless unless you're paying for a subscription.
★★★★★ Wasn't notified for renewal and was hit with a yearly price for an app this useless.
WHAT THEY ASK FOR
  • It seems to me that you need to have all the food for that meal prepared and I put it at one time. 4★, Oct 12, 2026
  • I want an app that will allow me to impute my actual goals. 1★, Sep 10, 2026
  • Please add time zone support. 4★, Sep 6, 2026
  • By and large a great app, but has some issues that the team needs to address (doesn't read Apple Health data it has access to; instead forces me to do enter exercise and food intake info I'm already entering in other… 3★, Aug 11, 2026
  • Also needs a feature where when you break your fast, it gives you a countdown to next fast based on the previously selected fasting program (with options for how obtrusive you want the notifications). 3★, Aug 11, 2026
  • I wish the algorithm in this app acknowledged that there is a limit to how long you can safely fast. 2★, Jun 14, 2026
  • not very happy with the way it's set up i want to be able to add the AMOUNT of food im logging . 3★, May 19, 2026
  • I wish that I could connect to my Garmin Connect app. 3★, May 19, 2026
WORDS THAT KEEP COMING UP IN BAD REVIEWS
free trial43free version31pop ups13
WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Fast21%

18 of the 4 and 5 star reviews.

★★★★★ Only way to lose belly fat is to fast I love sugar an burgers This app keeps me aware where I want to be and I see im making small improvements not doing it as well as I can be but I'm not stopping
★★★★★ Anytime I think about breaking my fast I just look at the timer for some motivation.
★★★★★ Today was the final straw, I couldn't log a fast without agreeing to a free-seven day trial that I would have to consciously cancel in time if I didn't want to be charged for a subscription plan.
Easy to use18%

16 of the 4 and 5 star reviews.

★★★★★ Works as designed - super easy to track fasting!
★★★★★ I love this app already. Anytime I think about breaking my fast I just look at the timer for some motivation. I would highly recommend for anyone struggling to fast.
★★★★★ I've used Zero for years because it's simple to use, but over the years I've noticed the escalating efforts to sell a Premium subscription which I understand from a business perspective.
Useful, it helps17%

15 of the 4 and 5 star reviews.

★★★★★ I love this app it's completely free to track your fasting times and it helps me hold myself accountable def recommend
★★★★★ Really like this app it's very helpful!
★★★★★ So very helpful when I use it to track my fasting goals.
Worth the money14%

12 of the 4 and 5 star reviews.

★★★★★ I love this app it's completely free to track your fasting times and it helps me hold myself accountable def recommend
★★★★★ I've been using Zero for many years, both Free and Plus.
★★★★★ Loved it when it was free but now forced into 7 day free premium which I don't!
Fun, addictive9%

8 of the 4 and 5 star reviews.

★★★★★ Some of us just want to enjoy the solidity of the timer which no longer appears to be possible with this app.
★★★★★ Nice UI and very useful. Only complaint is the notifications in the app are all off but the app keeps spamming me with notifications. Had to disable it in system settings.
★★★★★ I trying have been enjoying tracking my meals and water intake.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, United Kingdom App Store.

★★★★★Oct 21, 2026
The BEST food tracker EVER

I started using Zero on January 31, 2026, weighing 159 pounds. Within just 3 months, I was down to 129 pounds! I’ve followed this app throughout my entire journey, and the results have been incredible. I currently weigh 119 pounds and went from a size 10 to a size 2 in less than 6 months! Zero has helped me stay consistent, accountable, and focused on my goals. I couldn’t be happier with my results. THANK YOU, @Zero!

★★★★★Oct 20, 2026
payment is predatory

will not allow me to say no to the free trial it’s offering to use the app

★★★★★Oct 20, 2026
Scam

I have been a user for a while. I also wanted to pay for it only to be told the pricing is 80 a year when I went to cancel they said they will reduce to 37 for the next year. I mean they have a single license plan yet they choose not to display that. Absolutely a scam to get as much money from you as possible

★★★★★Oct 19, 2026
UI update made it unusable

This was my go-to fasting app for YEARS but recently they completely changed the UI and have made it virtually unusable for me now (everything is compact, harder to find and tap tiny buttons). Also multiple pop-ups pushing for subscription services. No thanks.

★★★★★Oct 16, 2026
Forces premium

I wanted to use the free version but I couldn’t get past a forced free trial, that required payment method for auto renewal- ugh

★★★★★Oct 15, 2026
Don't waste your time

Previously I have used this app for a couple of YEARS. Now? You cant start another fast after finishing one. Do not waste your time with this horrible app. Will be deleting.

Apps like this

Same category, earning about as much.

Store screenshots

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App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

No App Store ads in the EU
None in the last 90 days.

Apple only publishes ads shown in the EU (EU Digital Services Act), with a 7 day delay. An app that advertises only outside the EU shows nothing here.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

zero13fasting11protein10zero plus8plus6weight5weight loss5fasting protein5meals4streaks4routine4better4zero fasting3habits actually3body composition3timers streaks3routine zero3hit protein3protein score3water tracking3loss3tracking3fasts3composition3

What's new in 7.15.0

Fasting, hands-free. This update makes Zero easier to reach when you're on the go, with enhanced Siri support for fasting and a quicker way into meal logging. • Fasting with Siri: Start, end, or check on your fast just by asking — try "Start my fast in Zero." Zero now works with Siri automatically, with no setup needed, and is updated for the new Siri in iOS 27. • Quicker Meal Logging: Add the new Log Meal control to your Lock Screen, Control Center, or Action button to jump straight into logging a meal. Requires iOS 18 or later. • Bug Fixes: Fixed an issue that could prevent logging your weight on iOS 27, and improved compatibility with the latest version of iOS.

Released Dec 23, 2016. Current version shipped Oct 5, 2026.

Store description

Zero is the all-in-one fasting tracker and nutrition app built for real results. Most fasting and weight loss apps stop at simply tracking fasts or calories. Zero connects the full picture — fasting, protein, meals, hydration, and habits — so you actually change your body composition, not just your eating schedule. Here’s how Zero helps you get there: • Track your intermittent fasting — Engage timers, streaks, and insights keep you stay motivated and consistent across your entire fasting journey. • Log meals the smart way — Skip the tedious manual meal entry routine. With Zero Plus, snap a photo and get instant macros, protein composition, and clarity on how effectively your meals support your goals. Your first meal logs are on us, so you can try it before you subscribe. • Hit your Protein Score — Zero Plus tracks a personalized daily protein target that adapts to your weight and goals. Better protein = better satiety, better muscle retention, better weight loss. Zero makes it automatic. • Complete the equation: Fasting + Protein — Most people fast or track meals. Zero brings them together so you lose weight, protect muscle, and avoid the pressure and guilt of traditional calorie trackers. • Stay hydrated to power your fasts — Water tracking with Zero Plus helps you maintain energy, reduce cravings, and support metabolic function throughout the day. • Build healthy habits that actually matter — Track movement, sleep, mood, and other daily pillars that reinforce your fasting and fueling routine. • Challenge yourself — Hit protein targets, maintain fasting streaks, and stay accountable with motivating challenges built around outcomes, not vanity metrics. • Learn the real science — Understand how fasting, protein, and hydration work together for sustainable weight loss and metabolic health — with insights from leading experts. • See measurable progress — Watch your streaks grow, your protein consistency rise, and your body composition improve with clean, insightful trend views. Whether you’re starting out or optimizing an existing routine, Zero gives you the structure, guidance, and clarity most apps miss. Zero is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult your doctor or qualified healthcare provider before making any changes to your diet, fasting routine, or health regimen. Zero is free to download, with fasting timers, streaks, weekly trends, expert articles, and challenges included. Zero Plus is an optional subscription that unlocks photo meal logging and your Protein Score, water tracking, custom fasts and saved presets, Fat-Burning Mode, the mood journal and daily habit insights, premium articles and Plus-only challenges, and monthly, yearly, and correlated charts. A free trial is available. Payment for Zero Plus will be charged to your Apple Account when you subscribe. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Manage your subscription in your Account Settings. Read more terms & conditions: Terms of use: https://www.zerolongevity.com/terms-of-use Privacy policy: https://www.zerolongevity.com/privacy-policy

See this store page in another country

Prices, ranks and reviews are per country. Revenue above is already worldwide.

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