Comparison

WaistProof vs Flow Fasting Tracker

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

WaistProof

Features
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The scale isn't lying โ€” it's just telling an incomplete story. WaistProof is a body progress app for people who train, eat well, and still watch the scale stay flat. Instead of building around weight as the primary signal, WaistProof tracks what actually changes when effort is working: your measurements, your eating patterns, and your daily consistency. BODYTAPE โ€” SEE YOUR SHAPE CHANGE Track waist, hips, chest, arms, and thighs weekly. Watch the trend, not just today's number. When your waist drops while your weight holds steady, WaistProof shows you that. That is progress. MEALWINDOW โ€” KNOW WHEN YOU EAT Log your first and last bite of the day with one tap. See your real eating window. No fasting ideology โ€” just a clear picture of your pattern over 7 and 30 days. DEFICITSTREAK โ€” STAY HONEST One question every night: did you stay on plan today? Yes or No. Build a streak. When life happens, one free protection keeps your momentum. No punishment. Just honest tracking. WEEKLY PROOF Every week, WaistProof generates a plain-language summary of your average eating window, on-plan days, and body measurement delta. No overwhelming dashboards. MONTHLY PROOF CARD After a month of consistency, unlock your branded progress card โ€” real numbers, real dates, real change you can actually see. WHO WAISTPROOF IS FOR โ€ข You train and your waist is shrinking but the scale barely moves โ€ข You've burned out on calorie logging and want something lighter โ€ข You want to stay honest daily without making it a whole system โ€ข You care more about how your body measures than what it weighs WHAT WAISTPROOF IS NOT No calorie counting. No macro tracking. No food database. No AI diet coaching. No workout plans. Free to start. Premium unlocks full measurement history, trend charts, monthly proof cards, streak recovery, and 30-day eating window insights. All data is stored on your device. No health data is shared without your explicit permission.

About

Flow Fasting Tracker

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Your cycle changes everything. Most fasting apps ignore it. Estrogen, progesterone and testosterone each shift your metabolism, energy and hunger differently across your cycle. Flow Fasting tracks where you are and guides your fasting practice around it, so you always know the right window for your phase, and why it works. Whether you struggle to fast during your luteal phase, feel unstoppable in follicular, or want to understand why your results change week to week - Flow Fasting gives you a science-backed approach for every phase of your cycle. FIVE PHASES. FIVE DIFFERENT FASTING STRATEGIES. Bleed: Rest and restore. Shorter windows, nourishing breaks. Follicular: Your peak window. Longer fasts, stronger results. Ovulatory: High energy. Maintain momentum and protect your gains. Early Luteal: Shift with your hormones. Moderate and consistent. Late Luteal: Listen to your body. Gentle windows, no force. WHAT'S INSIDE: Phase-synced fasting windows Fasting recommendations that adapt to your cycle every day. Built around your phase, your goals and your rhythm. Fasting timer A clean, focused timer with real-time milestone markers at 14, 16 and 24 hours. Know exactly where you are in your fast and what your body is doing. Cycle insights Charts that connect your fasts, weight and steps over time. Spot your patterns, track your progress and understand how your cycle shapes your results. Daily log Track weight, steps, symptoms, energy, mood and sleep every day. Watch your insights build as your data grows. Sync your steps from Apple Health with one tap. Toggle it on in Settings to see your activity alongside your fasting and cycle date. Phase nutrition guide What to eat in every phase of your cycle. Food directly affects how well you fast - Flow Fasting connects the two. By phase comparison See how your energy, mood, sleep and fasting performance compare across all five phases. Built from your own data over time. Week planner Plan your fasting windows ahead. Map your cycle, set your intentions and remove the daily guesswork. Science guide The research behind cycle-synced fasting. Hormones, metabolism, autophagy, cortisol and more - all explained through a cycle lens. START FREE: Try Flow Fasting free for 7 days with annual plan. Full access. After your trial, you will be charged $39.99 unless cancelled before the trial ends. Monthly plan available at $7.99 per month, billed immediately. Cancel anytime in App Store settings. For wellness purposes only. Not medical advice. Terms of use: https://flowfasting.com/terms-of-service/

Screenshots

WaistProof4 screens
Flow Fasting Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: WaistProof at none against Flow Fasting Tracker's 2. Flow Fasting Tracker's advantage is iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Flow Fasting Tracker sells 2 in-app purchases, starting at $7.99 per month. WaistProof asks for nothing beyond the download.

UpkeepUpdate frequency

WaistProof ships an update every 8 days, Flow Fasting Tracker every 10 days. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.

Scorecard2 real differences ยท 4 level
WaistProof versus Flow Fasting Tracker: the parameters behind the verdict, then further details
ParameterWaistProofFlow Fasting Tracker
PriceFreeFree
Update frequencyEvery 8 days โ€” betterEvery 10 days
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 โ€” better
Further details โ€” not scored
Size50 MB16 MB
Age rating12+4+
DeveloperDan TongKristina Kozicynaite

In-app purchases

None

WaistProof

No in-app purchases

2 purchases

Flow Fasting Tracker

Subscriptions2
  • Monthly$7.991 Month
  • Annual7 Days trial$39.991 Year

Questions

Is WaistProof free?
WaistProof is free to download, with no in-app purchases.
Is Flow Fasting Tracker free?
Flow Fasting Tracker is free to download, with in-app purchases available.
Do WaistProof or Flow Fasting Tracker have ads?
Neither WaistProof nor Flow Fasting Tracker shows ads.
Which is updated more often, WaistProof or Flow Fasting Tracker?
WaistProof ships an update every 8 days, and Flow Fasting Tracker every 10 days. Most recently, WaistProof was updated on October 25, 2026 and Flow Fasting Tracker on October 13, 2026.

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