Deficit: AI Nutrition Coach

Deficit follows science-backed approach for getting in shape. It monitors your activity, nutrition quality and body composition dynamics. Weekly review algorithm adjusts calorie and protein goals based on what actually happened to your weight, body fat, and activity. If your week includes strength training, long runs, cycling or swimming, this is the tracker that accounts for all of it. DIET CYCLES Most calorie trackers assume you'll log food indefinitely. That's not how good diet phases work. You commit to a block, execute it, and move on. Deficit structures this the way a coach would. Set a goal, pick a duration, set a start date. Monitor what's going on and adjust. When the cycle ends, you're done. Start another one when you're ready. You also get powerful data analysis tooling, like weight forecast, trend weights and weekly averages. WEEKLY REVIEW At the end of each week, the algorithm looks at four things: how your weight changed, how your body fat changed, your activity level, and whether you logged consistently. From that, it adjusts your calorie and protein targets. Weight dropped but body fat went up? Targeted calorie reduction. Weight stalled but body fat came down? Great, you're probably in recomposition. Logging was inconsistent? The algorithm flags it rather than making adjustments on bad data. FAST LOGGING Five input methods, all built for speed. Search: fast lookup against a verified food database with one-tap add and remembered portions. Photo: point your camera at the plate, AI identifies the food and fills in macros. Voice: say what you ate, it gets parsed into entries. Barcode: scan and go. Custom: build your own meals from ingredients or save custom products. Recents and favorites are one tap. The whole point is to keep logging fast enough that you actually do it for the full cycle. BODY COMPOSITION Weight is easy to measure metric, but it's fluctuating and unreliable. Deficit cross-checks weight data with estimated body composition. There are many cases when weight alone will stall or even grow, but it's actually muscle growth which is good for you. To measure body composition, Deficit proposes wide toolkit: from filling in body fat data from DEXA and smart scales, to US Navy Seal body fat FUEL CLAIM Runs, bike rides, swims, and sessions over 60 minutes earn calories back. The math uses peer-reviewed energy expenditure data and Apple Health workout metrics. So, daily targets automatically go higher on big training days and come to baseline on rest days. WHO THIS IS NOT FOR My wife disliked all calorie tracking apps because they are either slow or inaccurate (or both). So I decided to build one we both would enjoy. However, this is not a beginner weight-loss app. If you want a casual wellness tracker and enjoy gamification, there are other good apps. Deficit is for people who take nutrition seriously and want structured, evidence-informed diet plans. Subscription Pricing & Terms Deficit offers a 7-day free trial, then an auto-renewing Deficit Pro subscription at one of the actual rates. Payment is charged to your Apple ID at confirmation of purchase. Your subscription auto-renews unless cancelled at least 24 hours before the end of the current period; your account is charged for the renewal within 24 hours of the period ending. Manage or cancel your subscription anytime in your Apple ID settings. Terms of Use (EULA): https://deficitapp.io/terms Privacy Policy: https://deficitapp.io/privacy