Comparison

Heavier vs Onus Strength

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Heavier

This AI-powered strength training app analyzes your workout data to provide insights on progress and areas for improvement. It offers a daily AI coach with workout plans and allows for hands-free logging via voice commands.

Highlights
  • AI-assisted strength training
  • Progressive overload tracking
  • Workout volume, frequency, and balance analysis
  • Daily AI coach and workout plans
  • Voice-activated lift logging
  • Hands-free operation
Features
Read full description

HEAVIER - AI-Assisted Strength Training Progressive overload for lifters who mean business. Log Your Lifts. Zero Friction. AI analyzes your volume, frequency, and balance. You get the truth: what's working, what's lagging, where you stand. AI coach delivers a daily run-down of your workout, and a daily plan for how to get stronger. Leave your phone in the locker. Tell Siri "Record a lift in Heavier," then dictate your work: "Romanian Deadlift, 3 sets of 10 at 135 pounds." Done. Back to training. Built for lifters chasing strength, not likes.

About

Onus Strength

Features
Read full description

Onus: own your workout tracker. No subscriptions. No recurring fees. Pay once, lift forever. Tired of paying yearly just to log your sets? Onus is a complete strength training tracker built for lifters who are done renting their apps. Real Apple Watch Integration Track your workout from your iPhone, your Apple Watch, or both at once — fully synced in real time. Leave your phone in your bag and go watch-only. Leave the watch at home and use just your phone. Or run both together and switch seamlessly mid-workout. Even without your phone nearby, the Watch app starts, logs, and finishes a full workout on its own — including live heart rate and calories, a Now Playing music screen, and a watch face complication for one-tap access. Fast, focused, and lightweight No bloated media slowing things down. Onus is built to open instantly and stay out of your way — with quick links to trusted exercise tutorials whenever you need a refresher on form. A massive exercise library Browse 1,200+ built-in exercises with muscle group and equipment info, plus instructional lookups via YouTube and other trusted sources — or add your own custom exercises for movements or gym equipment that aren't in the catalog. Everything you need to train • Log sets, reps, and weight with a fast, intuitive interface, including live +/- adjusters and a custom keypad • Automatic personal record detection, celebrated with a trophy animation and marked everywhere your best lifts appear • Group exercises into supersets and circuits with round-by-round rest control • Built-in rest timers that keep counting even in the background • Build and reuse custom routines and multi-workout programs, or start from one of Onus's preloaded programs • Track your progress over time with clear history, weekly summaries, and trend graphs for 1RM, top set, volume, and max reps • Export your workout history to CSV, or share programs and workouts with training partners via file import/export • Automatic private iCloud backup, recoverable if you lose or replace your device Built to last, not to bill No subscriptions. No paywalls hiding basic features. No "premium tier" games. Pay once, and Onus is yours — including future iOS compatibility updates. Private by design Onus doesn't collect, transmit, or sell your data. No account, no ads, no tracking — everything lives on your device (and your own private iCloud, only if you choose to back up). If you've ever felt like your fitness app was working against your wallet more than your workout, Onus was built for you.

Screenshots

Heavier4 screens
Onus Strength4 screens

Verdict

The call

The clearest difference is in-app purchases: Heavier at none against Onus Strength's 1. On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Onus Strength sells 1 one-off in-app purchase. Heavier asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Heavier versus Onus Strength: the parameters behind the verdict, then further details
ParameterHeavierOnus Strength
PriceFreeFree
Rating4.2 (13 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings13 — better—
Update frequencyEvery 4 days—
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS18.017.0 — better
Further details — not scored
Size34 MB9 MB
Age rating4+4+
DeveloperStrategic Information ServicesNathaniel Faiad

In-app purchases

None

Heavier

No in-app purchases

1 purchases

Onus Strength

One-time1
  • Full Unlock$19.99

Questions

Is Heavier free?
Heavier is free to download, with no in-app purchases.
Is Onus Strength free?
Onus Strength is free to download, with in-app purchases available.
Do Heavier or Onus Strength have ads?
Neither Heavier nor Onus Strength shows ads.

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