The Workout App That Tells You What Weight to Lift

Updated July 2026

An app that picks your weights does two jobs. It sets your first working weight before you have any history, and it plans every next session's loads from the sets you actually logged. LiftRing does both — and prints the reason next to every number.

Here's what "the app picks your weights" actually means in practice. Job one: the starting weight. Open the app with zero history and it should still put a defensible number on the bar — not an empty field. Job two: every weight after that. When you finish a session, the app applies a progression rule to what you logged — add, hold, or back off — and opens your next workout with the numbers already filled in. Do both jobs and the lifter never brings a spreadsheet, never scrolls last week's log doing arithmetic at the rack, and never wonders whether they earned the jump.

LiftRing is built around exactly this. It computes your starting weights from your bodyweight and experience when you have no history, and from then on each of its 15 built-in programs runs its own embedded progression — linear progression, double progression, or 5/3/1-style AMRAP — pre-filling every set with a one-line reason like "+5 lb — you hit all your reps." LiftRing isn't the only app that will pick a weight for you, and this page doesn't pretend it is. The differences are in how each app decides — and whether it tells you why.

How different apps decide the weight on the bar

Strength apps that touch weight selection at all use one of four mechanisms. Knowing which one you're getting matters more than any feature list.

The split that matters: StrongLifts runs one method very well; Fitbod and Dr. Muscle automate the decision behind a model; Hevy and Strong are excellent logbooks that mostly leave the decision to you. LiftRing's position is a stated rule per program — automated like the model-driven apps, but with the method named up front and the reasoning printed on every set. The full loop is on the how it works page, and the deeper comparison lives at the progressive overload app that shows its work.

How LiftRing picks your first weight — with no history

The hard case is day one. You've never logged a set, and the app still has to put a number on the bar. LiftRing's model is deliberately simple:

• Anchor lifts first. Your bodyweight and self-reported training experience set a base estimate for the anchor barbell lifts — squat, bench, deadlift, press. More experience, higher coefficient. That's it: no quiz about your "fitness journey," no fake precision.
• Everything else derives from an anchor. Each of the 220+ exercises in the catalog maps to its nearest anchor at a fixed fraction — a front squat starts as a fraction of your squat estimate, a close-grip bench as a fraction of your bench. One consistent model instead of 220 guesses.
• Warmups are computed too. Every working weight gets a warmup ramp calculated up to it, so "what do I warm up with" is answered before you ask.

These are estimates, not measurements, and LiftRing treats them that way: they're conservative on purpose. A first session should feel light. Within two or three workouts the progression has calibrated to what you actually logged, the estimate stops mattering, and every number after that is earned from your own sets. If a starting weight is wrong, you type over it and the program adapts from there.

What happens when you miss reps

An honest weight-picking app has to handle the sessions that don't go well, because those are most of training. Miss reps in LiftRing and the progression responds by rule, not by pretending it didn't happen:

• Hold. On most programs, one rough session means the weight stays put and you get another shot: "holding 135 lb — finish your reps first."
• Back off. Keep stalling and the program deloads you — a stated cut so you can rebuild momentum with clean reps instead of grinding the same miss for a month. The reason line says so plainly; a deload is part of the method, not a punishment.
• Rep-range and AMRAP programs adjust differently. Double progression simply keeps you in the rep range longer before the next weight jump, and on Linear Progression AMRAP your top-set reps directly set the next session's load — fewer reps, smaller move.

Apps that only ever add weight aren't running progression — they're running a countdown to a plateau. The deload logic is as much the product as the plus-five.

Frequently asked questions

Is there an app that increases weight automatically?

Yes — several, and they decide differently. StrongLifts adds a fixed increment when you complete all your sets and deloads automatically when you stall. Fitbod and Dr. Muscle set loads from an algorithm that reads your logged performance. LiftRing ships 15 programs that each carry their own progression rule — linear progression, double progression, or 5/3/1-style AMRAP — so the app pre-fills every next weight and shows the reason in one line. Plain logbooks like Hevy and Strong show your previous numbers but leave the decision to you, though as of July 2026 Hevy's paid Trainer feature can also adjust weights.

How much weight should I add each workout?

It depends on the progression you're running. On beginner linear progression, the standard answer is a small fixed jump — commonly 5 lb on the barbell lifts — every session you complete all your reps, with smaller jumps on presses. Once that stalls, double progression adds reps inside a range first and only then adds weight, and 5/3/1-style programs move the load off an AMRAP top set. LiftRing runs whichever rule your program uses and pre-fills the number, so you never have to decide at the rack.

What weight should I start with?

If you have history, start from what you last lifted. If you don't, LiftRing estimates a first working weight for you: your bodyweight and experience level set a base for the anchor barbell lifts, and every other exercise in the 220+ catalog derives from its nearest anchor. The estimates are deliberately conservative — a first session should feel light, because the progression closes the gap within a few workouts and the weights you actually log take over from there.

Try it on your next workout

LiftRing is for iPhone (iOS 18+), with no account to create — your data stays on your device with optional private iCloud sync, and the App Store privacy label reads "No data collected." Between sets, the rest timer runs in a Live Activity and the Dynamic Island. Your first 3 workouts are free with every program and feature unlocked; after that LiftRing Pro is $4.99/month (7-day free trial), $44.99/year, or $99.99 once for lifetime, billed through Apple — details on the pricing page.

Keep exploring

• How LiftRing works — the pre-fill-and-reason loop, start to finish
• The progressive overload app that shows its work — logbooks vs. black boxes, in depth
• The programs library — all 15, each with its progression method stated plainly
• Pricing — what's free and what Pro costs