KeyLifts - 531 Workout Log

KeyLifts - 531 Workout Log

5/3/1 & nSuns Strength Tracker

842 ratings
133 reviews
Free
In-App Purchases

Details

Released
October 26, 2018
Updated
October 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 about KeyLifts

See all reviews

What's New in KeyLifts

5.23.2

October 17, 2026

- Fixes crashing on launch for iOS 17 and below.

3

Subscriptions & In-App Purchases

A Year of KeyLifts Pro

45% off all Pro features

$29.991 Year
How to cancel KeyLifts subscription ⁉️

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

Great for 531 and more

Great app. Responsive developer. Ongoing maintenance and improvements. Great for Wendler-style programming but designed flexibly enough to do lots of other stuff too. Well worth trying.

Great app! Great support

I’m pretty sure I found this app on Reddit. I pay for the premium version, and it’s well worth it. I love the diversity of templates available. I love that you can input what plates you have, and the calculator will adjust to your plates. One day the servers were down, I contacted the email and service was prompt and friendly. It was fixed the same day. Excellent app if you’re interested in lifting.
Show more

Great app

I tried a bunch of workout apps, but landed and committed to this one pretty quickly. If you do “pure” 5/3/1 you’ll have an endless variety of options from Wendler’s books. If you mix it up with other programs, or like to build your own, KeyLifts is quite flexible and easy to program. If you don’t have a familiarity with the 5/3/1 protocol, you may struggle with the app at first because it really does revolve around that approach to strength training- but you can create anything you want once you understand the UI.

If I have one complaint, it might be that there is too much information- so many 5/3/1 templates, and just about every exercise you can imagine with every piece of equipment or machine you could use. There are filters, which help, but I’d like the option to just toggle off machines and stuff I never plan to use.

Developer is constantly improving the app, and responds quickly to bug reports and suggestions. Top notch!
Show more

Greatest app ever!

I was skeptical about purchasing this app because I’ve used used five different 531 apps., on the most part they were limited to very few templates and each had some type of flaw. After trying this app for a week, I signed up for the yearly rate., that is how pleased I am using this app. This app was well researched and easy to use.
Show more

Middling to bad

Obviously a hobby project and not really a serious product but for the price, one would expect much much more.

Pros: Intuitive enough to use. Built in templates. Decent basic features as a tracker.

Cons: Useless and completely out of touch updates that make the app buggy. Broken search system that wastes time mid workout.
Show more

Response from developer

The feedback about search is useful and appreciated, but for me to improve the app based on your complaints I'll need more actionable info. Feel free to send me a more message in the app with specific things that need improvement. The personal dig about this being “obviously a hobby project” isn’t feedback, it’s just an insult. There’s nothing wrong with strongly criticizing a product, but if your going to send me more messages about the about (and I genuinely hope you do) basic respect for the human being on the other side of the screen is required.

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.