OneWay: Deficit
OneWay LLC Health & Fitness iPhoneiPadiPod touch
OneWay: Deficit is a free Health & Fitness app for iPhone and iPad by OneWay LLC. Requires iOS 17.0. Updated October 29, 2026.
- Price
- Free
- on the App Store
- Size
- 25 MB
- Age 4+
- Updated
- Oct 29
- 2026 · v1.1
Screenshots
About OneWay: Deficit
OneWay: Deficit — weight loss based on the first law of thermodynamics. You run on calories the way a car runs on gas. A car stops when the tank is empty; your body keeps going by using stored energy. OneWay does not tell you what to eat or put you on a diet—it helps you log what you actually eat, learn how many calories are in it, and see whether you are in a surplus or deficit each day. Over time, that picture is what moves the scale. Eat what you want. Build the habit of logging, notice patterns, and decide what to change based on real numbers—not rules from an app. What OneWay does • Log calories fast — breakfast, lunch, dinner, snacks. • Import burn and weight from Apple Health — activity tracker + smart scale are required. • Dashboard — surplus or deficit at a glance, day by day. • Stats — weight trends and cumulative deficit over time. • Smart Forecast — estimates how many calories you will burn for the rest of the day so that you can finish the day in a deficit. • Smart Calibration — after enough weigh-ins, OneWay suggests an adjustment so your burn estimate better matches your body (you choose whether to apply it). • Smart Reminders — gentle nudges to log breakfast, lunch, and dinner. • Saved meals — log meals you eat often in one tap. Two are free; OneWay Smart is unlimited. • Share Progress — share your journey with the details you choose — streaks, deficit, and weight progress. Hit your goals your way OneWay does not set a target weight or calorie goal for you. You see the math—surplus, deficit, and trend—and use it to move toward your goals, with a healthcare or nutrition professional if you choose. Best with • Apple Health enabled (weight + active/resting energy) • Activity tracker synced to Health for daily burn • Smart scale syncing weight into Health • Consistent logging and regular weigh-ins Your data stays on your device No accounts. No cloud sync. Calorie logs and settings are stored locally on your iPhone. Educational tool — not medical advice OneWay does not prescribe calorie targets, meal plans, or medical treatment. Work with a qualified professional before changing diet or exercise. Pricing OneWay is free to download. Core logging and HealthKit import are free. Smart Forecast, Smart Calibration, Smart Reminders, unlimited saved meals, Share Progress, and other Smart features require OneWay Smart — an optional auto-renewable subscription (monthly or yearly) with a 14-day free trial. Cancel anytime in App Store settings. No advertising. Legal Privacy Policy: https://onewaycoaching.app/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ OneWay Smart terms: https://onewaycoaching.app/terms.html
What’s new
Version 1.1 · Updated October 29, 2026
Smart Forecast estimates how many calories you will burn for the rest of the day so that you can finish the day in a deficit.
App privacy
The developer, OneWay LLC, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| OneWay: Deficit | – | Free | October 29, 2026 | |
| Progress - AI Timelapse | 3.9 / 5 (14) | Free | Oct 27, 2026 | Compare |
| UNIRA: AI for Surgeons | 4.3 / 5 (13) | Free | Sep 25, 2026 | Compare |
| Wellsheet | 5.0 / 5 (21) | Free | Sep 4, 2026 | Compare |
| Lenexa Parks and Recreation | 4.6 / 5 (192) | Free | May 14, 2025 | Compare |
| ISU Student Health Portal | 4.0 / 5 (8) | Free | Oct 27, 2026 | Compare |
| Behind the Knife | 4.1 / 5 (20) | Free | Oct 9, 2026 | Compare |
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