zyra.fit
Training and nutrition, tracked honestly.
Zyra builds two focused apps — one for the gym, one for the kitchen — around a single principle: your data is yours. No ads, no gimmicks, no numbers we can't stand behind. The math behind both apps is published here: free calculators, an exercise library, and guides that show their working.
Tools
All calculators →Nine calculators built on the formulas the apps run. Runs in your browser — nothing you type is sent anywhere.
Macro calculator
Daily calories and protein, fat and carb grams from the MacroDiet v2 formula.
Open →Calorie calculator
BMR (Mifflin-St Jeor), activity multiplier and TDEE, with maintain / lose / gain targets.
Open →Calorie deficit calculator
Weekly rate to a daily deficit, with the 35% cap and calorie floors the algorithm applies.
Open →Protein calculator
Grams per day from body weight and a protein tier — the same table MacroDiet uses.
Open →1RM calculator
Estimated one-rep max from a set (Brzycki to 12 reps, Epley above) and a rep-max table.
Open →Plate calculator
Plates per side for a target bar weight from your plate inventory, in kg or lb.
Open →RIR / RPE converter
Reps in reserve to rate of perceived exertion and back, with the app's clamps.
Open →Warm-up set builder
A warm-up ramp to a top set, every row rounded to a load you can actually put on the bar.
Open →Weekly sets calculator
Working sets per muscle for a planned week against the app's landmarks, plus a balance score.
Open →Libraries
Reference pages generated from the apps' own data — read them, check them, link them.
Muscles worked, rep targets, progression step, alternatives.
Muscle groups11Weekly-set landmarks and the exercises that count toward them.
Programs6Full body, upper/lower, push/pull/legs — generated from the app’s rules.
Glossary40RIR, e1RM, TDEE, trend weight — one tight definition each.
MethodologyEvery formula on the site, with constants and worked examples.
ResearchEvery source the articles cite, most-cited first.
Latest articles
All articles →Getting started with Zyra Workouts
Zyra Workouts is an offline-first iOS workout logger in development. The four tabs, the first workout, the day-one settings, and what it does not do yet.
App guidesLogging a set: the keypad, partial reps, left and right
How to log partial reps and unilateral sets in Zyra Workouts: the weight and reps keypads, the "+" key for partials, RIR chips, and the L/R split.
App guidesWarm-up, drop, myo and failure sets in Zyra Workouts
How to log drop sets, myo-reps, warm-ups and failure sets in Zyra Workouts: the set-type sheet, W/D/M/F badges, and which sets count toward volume.
App guidesSetting up your gym profile and plate inventory
The plate inventory in the Zyra Workouts app: bar weight (10, 15 or 20 kg), six plate sizes, named gym profiles, and what the inventory changes.
App guidesUsing the plate calculator in Zyra Workouts
The barbell plate calculator in the Zyra Workouts app: where it appears, how to read the breakdown label, and what "not loadable exactly" means.
App guidesSmart Progression: what the blue, yellow and red wand mean
Smart Progression in Zyra Workouts from its own rule: the rep ceiling, the step size, and why the wand is blue, yellow or red (not loadable).
The apps
Zyra Workouts
Fast, honest workout logging for iOS. A keypad built for the gym, a dashboard built from your own training, and every byte of your data yours — offline-first, no ads, no trackers.
MacroDiet
Macro & calorie tracking on the web: log food with barcode scanning, follow daily targets from a short onboarding, and watch your weight trend — plus free macro and calorie calculators in six languages.
One backend, one account
Both apps are clients of the same Zyra backend and account system. Your account is optional in Zyra Workouts — the app works fully offline without one — and when you do sign in, sync exists to back your data up and restore it, not to mine it.
Where things stand
We say this plainly because status matters: Zyra Workouts is code-complete and in pre-release testing — it has not been submitted to the App Store yet. MacroDiet is live on the web at macrodiet.fit and under active development. This page will change when that does.
- Zyra Workouts — iOS, in development, no store listing yet
- MacroDiet — web, live, features landing continuously
- This site — calculators and libraries live; articles arriving