Train531

The Only 5/3/1 App That Actually Coaches You

AI prescribes your accessories, analyzes your progress, and tells you what to do next — not just calculate percentages.

Download on the App Store See How It Works

Free for 10 workouts. No credit card required.

Features

Intelligence Behind Every Set

Smart Workout Generation

Your warmup, working sets, and AMRAP follow Wendler's proven percentages. Your supplemental and accessory work is prescribed by AI based on your training history, equipment, and goals.

Progress Analysis

Track estimated 1RM trends and weekly volume with clear charts. The AI coach analyzes your data and gives actionable feedback — not just graphs you interpret yourself.

Personal Records

Automatic PR detection using the Epley formula. Hit a new estimated one-rep max? You'll know immediately — no manual tracking required.

Not Just Another Calculator

Other 5/3/1 Apps

Calculate percentages from your training max
You pick your own accessories (or skip them)
Show you graphs with no interpretation
Rigid set order — can't adapt mid-workout
No awareness of your training history

Train531

Calculate percentages AND prescribe supplemental templates
AI picks accessories based on your weak points and equipment
AI analyzes your trends and tells you what to change
Swap any exercise mid-workout with an intelligent replacement
Every prescription informed by your full training history

Smart Rest Timers

Automatically tuned by set type. 60s for warmups, 120s for working sets, 180s for AMRAP.

50+ Exercises

Pre-loaded library with muscle group tagging, favorites, and search. Find what you need instantly.

Clean & Focused

No social feeds. No transformation photos. No bloat. Just 5/3/1, done right, with intelligence behind it.

iCloud Sync

Your training data syncs across devices automatically. Switch phones without losing a single rep.

Pricing

Try Before You Buy

Complete 10 full workouts free — no credit card, no time limit. That's roughly 2.5 weeks of real training.

Monthly

$4.99 /mo

AI workout prescriptions
Progress analysis
Unlimited workouts
iCloud sync

Start Free Trial

Save 42%

Yearly

$34.99 /yr

That's $2.92/month

Everything in Monthly
Best value for serious lifters
Lock in your price

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Frequently Asked Questions

What is 5/3/1?

5/3/1 is a proven strength training program created by Jim Wendler. It's built around four main barbell lifts — squat, bench press, deadlift, and overhead press — using a structured progression of percentages across weekly cycles. It's one of the most popular and effective programs for building real-world strength.

How is Train531 different from other 5/3/1 apps?

Every other 5/3/1 app is a calculator — enter your maxes, get percentages. Train531 is the only one with an AI coach that prescribes your supplemental work and accessories based on your actual training history, available equipment, and goals. It also analyzes your progress and tells you what to change.

How does the free trial work?

You get 10 full workouts completely free — no credit card, no time limit. At four sessions per week, that's roughly 2.5 weeks of real training. After that, upgrade to Pro to continue with AI-powered workouts.

Does the AI replace Wendler's programming?

No. The core 5/3/1 structure — warmup sets, working sets, and AMRAP — is calculated deterministically from Wendler's proven percentages. The AI only handles supplemental template selection (BBB, FSL, SSL) and accessory prescriptions, adapting those to your training history and weak points.

What data does Train531 collect?

Your training data (sets, reps, weights) is stored on your device and synced via iCloud. When the AI coach generates workouts or analyzes progress, a summary of your training history is sent to our API. We never sell your data. See our privacy policy for details.

What devices are supported?

Train531 requires iOS 26 or later. It works on iPhone and iPad.