WaistProof vs Rhythmus

The scale isn't lying — 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 — 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 — KNOW WHEN YOU EAT Log your first and last bite of the day with one tap. See your real eating window. No fasting ideology — just a clear picture of your pattern over 7 and 30 days. DEFICITSTREAK — 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 — real numbers, real dates, real change you can actually see. WHO WAISTPROOF IS FOR • You train and your waist is shrinking but the scale barely moves • You've burned out on calorie logging and want something lighter • You want to stay honest daily without making it a whole system • 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.

Rhythmus is a period tracker with a cycle calendar — plus a nutrition and training plan that changes with your cycle. WHAT RHYTHMUS DOES • Cycle and period calendar: log your period, see your cycle day and phase at a glance, with estimated ovulation and fertile window • Nutrition plan: meals and nutrients matched to your current phase – omnivore, vegetarian, vegan – with a shopping list • Training plan: workouts scaled to your intensity and training days, logged set by set • Supplements: which nutrients matter in which phase • Daily energy check-in: feeling low, and the app suggests a gentler session • Weekly overview, symptom diary, cycle statistics from your own history WHO IT IS FOR For women who train and notice that the same session feels easy one week and impossible the next. Menstruation, follicular phase, ovulation and the luteal phase each ask for something different — Rhythmus takes that into account. NO ACCOUNT, NO TRACKING No sign-up, no registration, no ads, no subscriptions, no in-app purchases. Everything you enter stays on your device and is sent nowhere. The app works fully offline. From Settings you can export a backup at any time and restore it on another device. WITH SOURCES Every health statement in the app comes with a citation you can tap — straight to the study or fact sheet. Among others from the Journal of the International Society of Sports Nutrition, the Journal of Medical Internet Research and the National Institutes of Health. Available in German, English and Spanish. Rhythmus is a free passion project. Note: Rhythmus is not a medical device, not a contraception method, and does not replace medical advice.