What fitzap apps makes

fitzap apps is the parent organization behind two focused health apps:

fitzap workout is an adaptive workout tracker for iOS and Android.
fitzap nutrition is a macro and calorie tracker for iOS and Android.

Both turn daily data into clear, useful guidance.

fitzap nutrition

fitzap nutrition tracks calories, macros, foods, and weight trends. Its targets adapt as progress changes, helping users cut, maintain, gain, or recomp.

fitzap nutrition is available on iOS and Android. Explore fitzap nutrition, download it on the App Store, or get it on Google Play.

What fitzap workout is

fitzap workout is a mobile workout tracker for iOS and Android that treats training volume — reps multiplied by weight, summed across sets — as a first-class metric. Where most gym apps focus on logging sets and showing personal records, fitzap workout plans your sessions, analyzes them after the fact, and adjusts your next workout based on how your weekly volume is trending and how each muscle is recovering.

The app is free to download and free to use. A premium tier unlocks deeper adaptive coaching and additional analytics. Data is stored locally first (SQLite on-device) with optional cloud sync, so the app works fully offline.

Available on the Apple App Store and Google Play.

Why volume?

In strength training, weekly volume is a useful signal for hypertrophy and long-term progress because it captures more of the work you actually perform than any single PR or one-rep-max estimate. Research on resistance-training volume and muscle growth, including a dose-response meta-analysis, supports treating volume as an important planning variable rather than a throwaway stat.

fitzap workout was built around this idea. Volume is not a side chart buried under a stats tab — it is the central signal that drives the app's coaching, plateau detection, and progression suggestions.

How volume is calculated. For strength work, volume = reps × weight, summed across sets, in the user's preferred weight unit (kg or lb). Cardio sessions and cardio-tagged exercises are excluded from strength-volume totals so hypertrophy tracking stays clean. Outdoor and cardio activity live in their own dedicated flows.

How fitzap workout works

1. Log your workout

Build unlimited workout templates from a library of exercises, or generate one with the AI Auto Workout based on the muscle groups and equipment you have available. During a session, log every set with reps, weight, and optional RPE. A rest timer and inline coaching tips ("Quads was last trained 9h ago — monitor your RPE closely") run alongside.

2. Adaptive progression

After each session, an adaptive pipeline analyzes the workout and updates the next prescribed sets, reps, and weight. The pipeline runs the following checks in order:

Session analysis: per-exercise volume, RPE, suggested next weight and reps, and whether progression is appropriate based on recent performance.
Plateau detection: identifies stalled lifts so they don't accumulate failed weight increases.
Deload evaluation: for premium users, suggests a deload week with appropriate cooldowns when fatigue indicators stack up.
Volume-based set adjustment: if weekly volume rose more than 15% week over week, the next session's sets are reduced by one (minimum one set) to prevent runaway accumulation. If volume fell more than 15%, sets are increased by one. With less than two weeks of history, no change is made.
Muscle-load guardrails: if the pipeline would add sets but a primary muscle's weekly load score is already above 0.75, the addition is skipped and the recommendation is logged as a note instead.

3. Coaching volume

Alongside raw tonnage (kg × reps), fitzap workout computes a decay-weighted "effective sets" score per muscle over a rolling window. Recent sets count more than older ones, mirroring how training stimulus actually decays. Each muscle is bucketed into zones — below maintenance, maintenance, productive, high — using thresholds aligned with published sets-per-week training literature.

4. Recovery readiness

A per-muscle recovery model estimates readiness from training load, time elapsed, and intensity. The home screen surfaces a Daily Briefing — readiness, weekly volume progress, your most popular exercise, and short tips like "Core rested for 38 days. Start lighter to stay safe."

5. Analytics and history

A customizable stats grid shows volume over time, weekly goals, PR progressions, estimated 1RM trends, training streaks, and per-muscle breakdowns. A calendar view lets you scrub through past sessions, with deep links (the volumelogic:// URL scheme) used for rich notifications and session sharing.

What makes fitzap workout different

Volume is the spine, not a side chart. Goals, PRs, rankings, XP, and adaptive coaching all read from the same volume signal.
Adaptive progression with guardrails. Set counts move automatically with your weekly volume trend, but won't push you deeper into overload when a muscle is already heavily worked.
Coaching volume uses time-decayed effective sets, not just raw kg × reps — a more accurate picture of recent training stimulus.
Unlimited workout templates, free forever. No paywalls or limits on the number of routines you can build.
Local-first storage. Your data lives in an on-device SQLite database. Cloud sync is optional, not required to use the app.
Strength and outdoor coexist cleanly. GPS-tracked cardio sessions live alongside lifting, but cardio is excluded from strength volume so your hypertrophy numbers stay meaningful.
Cohesive product design. Custom theming (including the dark "fitzap workout" theme), a branded URL scheme, and consistent visual language across calendar, sessions, and analytics.

Who fitzap workout is for

fitzap workout is built for lifters who want their tracker to do something with the data they put in. If you are training for hypertrophy or strength, care about weekly volume as a metric, and want progression suggestions that respect fatigue and recovery, the app is designed around your workflow.

It is equally usable as a simple set logger if that is all you need — none of the adaptive features get in the way of just opening a session and writing down what you lifted.

Privacy and data

fitzap workout is local-first. Every workout, set, and analytic is computed and stored on your device in SQLite. You can use the entire app — including templates, logging, analytics, adaptive progression, and outdoor sessions — without an account.

Cloud sync via Supabase is offered for users who want their data backed up or available across devices. It is opt-in. Full details are in the Privacy Policy.

About the maker

fitzap apps is built and maintained by Linus Westling, an independent developer based in Sweden. fitzap workout uses React Native and Expo, with a TypeScript engine for analytics, progression, and coaching volume.

Because it is independently developed, feedback goes directly to the person writing the code. New features and fixes ship continuously based on what users actually ask for.

Get the apps or get in touch

fitzap workout for iOS fitzap workout for Android fitzap nutrition for iOS fitzap nutrition for Android

Support: linus@fitzapapps.com
Privacy: privacy@fitzapapps.com
Legal: legal@fitzapapps.com