KeyLifts - 531 Workout Log

KeyLifts - 531 Workout Log

5/3/1 & nSuns Strength Tracker

827 ratings
127 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 26, 2018
  • July 17, 2026

Features

KeyLifts - 531 Workout Log screenshot #1 for iPhone
KeyLifts - 531 Workout Log screenshot #2 for iPhone
KeyLifts - 531 Workout Log screenshot #3 for iPhone
KeyLifts - 531 Workout Log screenshot #4 for iPhone
KeyLifts - 531 Workout Log screenshot #5 for iPhone
KeyLifts - 531 Workout Log screenshot #6 for iPhone
KeyLifts - 531 Workout Log screenshot #7 for iPhone
iphone
ipad
watch
🖼️Get Icon
Icons↘︎

About

This app simplifies the 5/3/1 strength training program by automatically calculating your sets and weights. Focus on lifting and achieving new personal records without the manual math. It offers features like warm-up sets, rest timers, and custom templates, with advanced options available through a subscription.

Automated 5/3/1 cycle planning
Personal Record (PR) alerts
Warm-up set tracking
Rest timer
Customizable workout templates
Plate calculator (Pro)
Progress graphs (Pro)
Show original description

What users say

See all reviews
+1

What's New in KeyLifts

5.21.0

July 17, 2026

This release includes important bug fixes and optimizations.

Subscription plans

A Year of KeyLifts Pro

45% off all Pro features

$29.991 Year
How to cancel KeyLifts subscription ⁉️
3

In-App Purchases

$99.99

Lifetime Access

Unlock everything in the Pro version

Events

Read more about April Strength Reset

April Strength Reset

4-week push with 5/3/1

Apr 1, 2026 Apr 30, 2026

Read more about 2025 Year In Review

2025 Year In Review

See your PRs and best lifts for the year!

Dec 18, 2025 Jan 18, 2026

Read more about 2023 Yearly Lifting Stats

2023 Yearly Lifting Stats

See your achievements over the past year

Jan 1, 2024 Jan 31, 2024

User reviews

This app is probably the best lifting log out there

I’ve been using it almost since day one, back when it was focused purely on 5/3/1. Since then, it's evolved into something even more powerful and flexible. What really speaks to me is how it keeps that clean, intuitive interface and that cult-classic “BigLifts2” vibe. What sets this app apart is how it adapts to you - the customization and the thoughtfulness behind every screen. It's obvious this is built by someone who actually lifts. So a huge shout-out to Jimmy C., the developer, who was kind enough to extend my Pro year when I reached out through Support, since my country is currently cut off from App Store payments. I was really surprised this app has so few ratings - it definitely deserves more recognition for its user-first approach. Highly recommended!
Show more

Great App for 531 and more

I’ve had this app for quite some time. I’m extremely happy with the lifetime subscription purchase. This app has been so useful. There’s many little additions that make it top tier. Also if you learn and understand the app, there’s so many possibilities for creating your own program.
I highly recommend KeyLifts, even if you’re on the fence with 531, due to the possibilities of program building.
Last great point is to this day the app is continuously being updated. I just submitted a ticket for a bug and had an email back in less than an hour.
Highly highly recommend! Buy the subscription too and the lifetime if available. It’s more than worth it!!!
Show more

Essential of 5/3/1

Fantastic and powerful app! Having the level of tracking has helped me, an advanced intermediate, finally get over certain strength humps. It doesn’t look incredibly sexy, but neither does Excel and we all know how powerful that tool is.

Great

Good app. Does everything i want in an app well. Has the right programs and ease of changing things to suit is awesome. Plus i reported a bug and it was sorted within 24 hours. Nice

Such a great app

Used it for the trial and bought the lifetime subscription straight after. The only app that fit exactly what I was after and is continuously being improved, thanks Jimmy!

Developer apps

User experience

🐞

Reported Bugs

3 issues

Weights resetting unexpectedly

Bug

Percentage calculations not always accurate

Bug

Inability to remove templates from workout screen

Bug

Requested Features

4 requests

Ability to set different training maxes for T1 and T2 lifts

Feature

More pre-built program templates (e.g. Juggernaut, Bromley)

Feature

Independent Apple Watch app (without needing iPhone)

Feature

Improved workout flow and exercise swapping functionality

Feature

FAQ

What does KeyLifts do?

KeyLifts is a strength training application designed to simplify the 5/3/1 and nSuns programs. It automatically calculates your training max and all subsequent sets, removing the need for manual calculations so you can focus on your lifts and achieving personal records.

What are the key features of KeyLifts?

The app offers features such as one-button planning for entire 5/3/1 cycles, alerts for new personal records, warm-up set tracking, a rest timer, and over 150 templates from the 5/3/1 books. You can also build custom templates and track assistance exercises and Joker sets.

How much does KeyLifts cost?

The app offers a free version with core logging features. An optional Pro version is available via monthly or yearly subscription, which unlocks advanced features like automatic training max progressions, cloud backup, a plate calculator, and progress graphs.

What kind of workouts can I track with KeyLifts?

KeyLifts is specifically designed for the 5/3/1 and nSuns strength training programs. It helps you plan and log workouts based on these popular, effective strength-building methodologies, ensuring you know exactly what weights to lift for each set.

Does KeyLifts work with Apple Health?

Yes, the application integrates with Apple Health. This integration allows you to sync your weight and workout data, providing a more comprehensive overview of your fitness journey and progress within the Apple Health ecosystem.