Fasting apps are everywhere, but most of them treat hunger like a high score. These five tools take a different approach — some louder, some quieter, all worth a look.
The fasting app landscape in 2026
Fasting apps have matured from simple timers into full-blown health platforms. You can now track protein, scan meals, sync with wearables, and follow stage-by-stage metabolic insights. But that growth has a cost: more features often mean more noise, more notifications, and more pressure to chase streaks. A quieter counter-movement is emerging too — apps that strip back the interface and focus on safety, honesty, and what the science actually supports. The five apps below sit across that spectrum, from feature-rich trackers to minimal timers, and each one serves a different kind of faster.
How we evaluated these fasting trackers
We looked at the same factors for every app: how clearly it explains what fasting does (and doesn't do), how it handles safety and medical warnings, how much of the core experience is free, how cluttered or calm the interface feels, and whether it respects your attention. Cinder stands out for its upfront safety screening and no-streak philosophy. Zero impresses with its protein-first meal tracking and polished insights. Easy Fast earns points for being ad-free and account-free with a generous free tier. Fasting - Intermittent Fasting brings a massive user base and deep plan customization. NutriScan shines by combining the fasting timer and food log in one place. Each app has a distinct personality — the right one depends on what you actually need.
Here's a quick look at how these five fasting trackers compare on the things that matter most: safety guidance, free access, interface calm, and feature depth.
| Provider | Best For |
|---|---|
| Zero: Fasting & Food Tracker | Fastrers who want protein guidance alongside their timer |
| Cinder — fasting tracker | Adults who want honesty and zero score-chasing |
| Easy Fast | Fasters who want a free, ad-free, no-account timer |
| Fasting - Intermittent Fasting | Fasters who want a full-featured, widely used tracker |
| NutriScan | Fasters who want their timer and food log together |
The five fasting trackers, up close
#1 Zero: Fasting & Food Tracker
A screenshot of the Zero: Fasting & Food Tracker website.
Zero is the fasting app you've probably already heard of, and for good reason. It pairs a one-tap fasting timer with intelligent meal tracking that puts protein front and center, so you're not just counting hours — you're actually fueling your body. The Protein Score gives you one clear number to aim for each day, which cuts through the macro math that trips most people up. You also get personalized insights based on your fasting patterns, plus water tracking with a simple tap. It's a polished, feature-rich experience that works well if you want guidance without overthinking it. The trade-off is that Zero leans into habit-building and consistency, which can feel like pressure if you're trying to avoid score-chasing.
#2 Cinder — fasting tracker
A screenshot of the Cinder — fasting tracker website.
Cinder is the rare fasting app that starts with a safety conversation instead of a countdown. Before you log a single hour, it asks about pregnancy, diabetes medications, eating disorder history, and other conditions that make extended fasting genuinely risky — and it tells you plainly when fasting apps aren't a good fit. The flame timer grows with your fast, but there are no streaks and no records to beat. You can choose Full Cinder with themes, water and food tracking, and friends, or Fast Only — just a timer and a flame in black and white. Safety guidance on breaking a fast and electrolytes is free in both versions. It's for adults 18 and older, and it says so without apology.
#3 Easy Fast
A screenshot of the Easy Fast website.
Easy Fast keeps things simple: no ads, no account, no catch. You download it and start fasting, which is refreshing in a category full of paywalls and pop-ups. The free tier covers popular daily fasts like 16:8 and 18:6, a Flexi Plan with no time cap, fasting stages from ketosis to autophagy, water and weight tracking, and even the ability to edit your history if you forgot to hit stop. Pro adds advanced plans like OMAD and 20:4, plus Expert Stage Insights that answer practical questions — how long hunger waves last, which drinks break a fast, whether one bite ruins it. It's built by a solo developer and trusted by a large Reddit fasting community. If you want a generous free app with no attention tax, this is a strong pick.
#4 Fasting - Intermittent Fasting
A screenshot of the Fasting - Intermittent Fasting website.
This Leap Fitness Group app is one of the most downloaded fasting trackers on the planet, with 50 million-plus installs and a 4.7-star rating from nearly a million reviews. It offers a customizable fasting timer with widgets, flexible plans from 14:10 to OMAD, water and weight tracking, and an AI food scanner with barcode scanning for calorie counting. You also get recipes, meal planning, and expert insights on hydration and food choices. Health data sync with Health Connect rounds out the package. The catch is that it contains ads and in-app purchases, and the sheer breadth of features can feel overwhelming if you just want a timer. But if you want an all-in-one tracker with a massive community behind it, this delivers.
#5 NutriScan
A screenshot of the NutriScan website.
NutriScan solves a real problem: most people run a fasting timer in one app and a food diary in another, so neither knows what the other saw. Here, your fasting window and your food log live on the same home screen, which matters when a 16:8 window gets undone by an eating window that runs hundreds of calories over target. You pick a plan — 14:10, 16:8, 18:6, 20:4, or custom — tap start, and a ring timer counts down. When the window opens, you scan your meal and see what you actually ate. The timer, every plan, streaks, and full history are free, with no card required. It's a practical choice if you want your fasting and nutrition data in one place.
How to choose the right fasting tracker for you
Start with safety. If you're pregnant, take insulin or a sulfonylurea, use an SGLT2 inhibitor, have a history of an eating disorder, are under 18, underweight, or have kidney, liver, or heart disease, talk to a clinician before fasting beyond a normal overnight window — and look for an app like Cinder that says so upfront. Next, decide how much you want the app to do. If you want protein guidance and meal insights, Zero or Fasting - Intermittent Fasting will keep you busy. If you want a timer and nothing else, Easy Fast or Cinder's Fast Only mode is calmer. If you hate juggling two apps, NutriScan puts the timer and food log together. Finally, check the free tier. Easy Fast and NutriScan are generous; others lean on subscriptions. Pick the one that matches your temperament, not the one with the longest feature list.
What a smart fasting workflow looks like
A good fasting routine doesn't need to be complicated. Start your fast with one tap when you finish dinner. Let the app handle the countdown and send a single notification when your window opens — no streak reminders, no guilt trips. During the fast, log water if you want; skip it if you don't. When you break the fast, take thirty seconds to log what you ate, either by scanning or typing a quick description. Once a week, glance at your history to see patterns, not to judge yourself. If you use Cinder, the safety guidance on electrolytes and breaking a fast is always free, so you can check it when you need it. The goal is a loop that runs quietly in the background, not another dashboard to manage.
The bottom line on fasting trackers
There's no single best fasting app — there's only the one that fits how you want to fast. Zero leads with protein and polish. Cinder leads with safety and honesty, and it's the only one here that screens you before you start. Easy Fast keeps it free and ad-free. Fasting - Intermittent Fasting gives you every feature under the sun. NutriScan merges your timer and food log so nothing gets lost between apps. Try one, and if it starts to feel like a scoreboard, switch. Fasting is a personal practice, not a competition.