Evolvi: Fasting Tracker

Evolvi is an intermittent fasting tracker with a dinosaur who gets stronger as you do. Start a fast, watch the countdown, and log what you eat when your window opens. Your companion Fastasours walks further along the trail each time you finish something — a meal logged, your water goal met, a fast completed. Miss a day and he's still there. WHAT YOU GET • A fasting timer for 12:12, 14:10, 16:8, 18:6 and 20:4, with a live countdown in your notification shade • A streak built on showing up, not on hours — a shorter fast still counts • Calorie and macro targets worked out from your own body, not a one-size-fits-all number • A food log with a built-in library, free barcode lookup and photo-assisted estimates • Weight tracking with a real trend line, not last-minus-first • Progress photos with a before-and-after comparison, kept on your phone only • A science timeline showing what's happening in your body at 4, 8, 12, 16 and 24 hours — with citations BUILT TO BE HONEST Most fasting apps tell you autophagy starts at 16 hours. The human evidence for that is thin, so Evolvi labels those stages as preclinical instead of stating them as fact. Your calorie target carries the caveat that it's an estimate. A weigh-in that goes the wrong way gets context about water and sleep, not a scolding. Evolvi asks a few health questions before you pick a plan, and if fasting isn't the right tool for you — pregnancy, a history of disordered eating, medication that needs food — it says so and doesn't offer the plans that don't fit. Stopping a fast early is logged like any other fast. There is no shaming copy anywhere in this app. YOUR DATA Evolvi works with no account. Core tracking stays on your phone; barcode lookup uses Open Food Facts only when you scan a packaged food. Sign in only if you want your progress backed up. Progress photos and meal photos are saved locally and are never uploaded — not even when everything else is syncing. Meal photo logging is an estimate flow: take or choose a photo, describe the food, then confirm the closest serving before it counts. NOT A MEDICAL DEVICE Evolvi gives no medical advice and everything it shows is an estimate based on what you enter. Talk to your doctor before starting an intermittent fasting routine, particularly if you are pregnant or breastfeeding, take medication that must be given with food, or have any history of an eating disorder. If your relationship with eating feels out of your control, fasting is not the place to start. In the US, the National Alliance for Eating Disorders helpline is 1-866-662-1235.