Apps by App Ktchn Ltd
One Rep Max - 1RM Calculator app icon

Health & Fitness

One Rep Max - 1RM Calculator

App Ktchn Ltd

Free download 5.00 · 1 storefront · 1 rating In-app purchases unconfirmed
Open on Apple

About this app

Calculate your One Rep Max from 2-12 max effort performed reps. Features: - Quickly & easily calculate your One Rep Max - Save calculations to track progress - View your 1RM percentages e.g. "70% one rep max" - Log multiple exercise types (Deadlift, benchpress, front squat etc.) - Create & add your own exercise types - View max weight history by exercise type - View charts showing your strength gains over time - Select a custom date when adding entries - Choose Imperial or Metric units

Latest release

What’s New

Version 1.05 Apr 13, 2018

This update from Apple will improve the functionality of this app. No new features are included. Added ability to reorder & delete exercise types

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
1 ratings
1 Aug 20, 2026 · 1 ratings Aug 20, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 20, 2026 · Free Aug 20, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 20, 2026 · 3:35 PM Free

Screenshots

One Rep Max - 1RM Calculator iPhone screenshotOne Rep Max - 1RM Calculator iPhone screenshotOne Rep Max - 1RM Calculator iPhone screenshotOne Rep Max - 1RM Calculator iPhone screenshot One Rep Max - 1RM Calculator iPad screenshotOne Rep Max - 1RM Calculator iPad screenshotOne Rep Max - 1RM Calculator iPad screenshotOne Rep Max - 1RM Calculator iPad screenshot