# Onyx: Workout Tracker — Gym Workout Tracker & Log

> Gym Workout Tracker & Log (iPhone/iPad app by Jessie Op 't Root.)

- Source: https://appshunter.io/ios/app/onyx-workout-tracker/id6817398304 (this page in markdown: same URL + `.md`)
- Developer: [Jessie Op 't Root](https://appshunter.io/developer/6817398306)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 21 MB
- Languages: American English
- Released: 2026-10-18
- Data updated: 2026-10-31

## What is Onyx?

Onyx is a focused workout tracker for people who lift. Open it, start a workout and log your sets. Nothing else in the way.

LOG FAST
• Track sets, reps and weight, or minutes for cardio
• See what you did last time next to every set
• Swipe a set to mark it done
• Live workout timer and a rest timer per exercise
• Unfinished workouts are saved automatically, even if the app closes

700+ EXERCISES
• Grouped by muscle and equipment, with a picture of the muscles each one works
• Filter for single-arm and single-leg exercises
• Add your own exercises

ROUTINES
• Save any workout as a routine and start from it next time
• Rename and reorder your routines

PROGRESS AND RECORDS
• Personal records for heaviest weight, estimated 1RM and best set
• A New PR alert the moment you beat one
• History and charts for every exercise
• Body weight tracking, in kg or lb

YOUR DATA
Onyx has no ads and no tracking. Your workouts are stored on your phone and backed up to your account, so they're safe when you switch phones. You can delete your account and all of its data in the app at any time.

## Is Onyx safe?

Not enough ratings yet to assess Onyx.

## Is Onyx legit?

Onyx: Workout Tracker has limited verification signals. The AppsHunter Legitimacy Score for Onyx is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-19

No release notes.

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-31.*