Onyx is the calorie tracker that learns.

Your real burn rate, recalibrated every day from your real intake and your real weight. While other apps lock you to a formula on day one, Onyx watches what your body actually does and adjusts. The longer you use it, the more accurate it gets.

LOGGING THAT GETS OUT OF THE WAY

Snap a photo of your plate. Scan a barcode. Type "two scrambled eggs and a banana." Onyx fills in the macros in seconds. Save the meals you eat every week and log them with one tap. Tracking stops being the thing you give up on.

A COACH THAT READS YOUR DATA

Onyx Chat answers from your actual logs, not generic advice. Ask "did I hit protein this week," "when was my biggest deficit day," "why did my weight plateau." Real numbers, in plain language, on demand.

BUILT FOR PEOPLE WHO WANT RESULTS

No streaks holding you hostage. No rings to close. No notifications nagging you back. Onyx is calm, monochrome, and built to disappear once the entry is logged. The numbers do the talking.

PRIVATE BY DEFAULT

Your data stays on your device. Cloud sync is optional. No ads. No data sales. No third-party tracking. Turn off analytics in Settings and Onyx stops collecting them. Full stop.

YOUR LANGUAGE, YOUR DIRECTION

Available in 18 languages including Arabic, Hindi, Japanese, Korean, and both Chinese variants. Full right-to-left support.

WHAT'S INSIDE

. Adaptive daily calorie and macro targets
. Photo, barcode, and natural language food logging
. Custom recipes and saved meals
. Weight tracking with trend analysis
. AI coach grounded in your real data
. Local-first storage with optional cloud backup
. Light and dark themes, multiple accents
. 18 languages with full right-to-left support

Onyx. The tracker that adapts to you.