Rack vs Garmin Native vs Hevy vs KeepStrong: Strength Tracking Compared

Choosing how to track lifting on a Garmin watch usually comes down to four options: Rack, Garmin’s native strength mode, Hevy, and KeepStrong. The short version: Rack is built for accurate, phone-free on-wrist logging that syncs to Garmin Connect; Garmin native is a free timer with no stored weights; Hevy is an excellent phone-first logger that is not built around on-wrist Garmin use; and KeepStrong is a low-cost Garmin app with a big exercise-demo library. This page compares them head to head so you can pick by what you actually value. Disclosure up front: this comparison is published by Rack, and we have kept it honest so it is useful even if you choose something else.

Last updated June 2026. Verify current pricing on each app’s store page before you buy.

Rack vs Garmin native strength mode

Garmin’s built-in Strength activity times your sets, estimates reps from wrist motion, and records heart rate. It does not let you choose the exercise, store the weight on the bar, or remember last week, and the rep count is approximate on movements where the wrist barely moves. Rack adds the part lifters care about: you sync a routine to the watch, confirm the exercise, weight and reps for each set on the wrist, and the finished session writes to Garmin Connect over the FIT file format.

• Pick Garmin native if: you only want time, heart rate and calories, and it is free and already on the watch.
• Pick Rack if: you want stored weights, real exercise names, progression, and confirmed numbers you can train against.
• Verdict: native is a fine timer; Rack is what makes the session trackable.

Rack vs Hevy

Hevy is a well-regarded phone-based strength logger with a large exercise library and a polished phone experience. It is a strong choice if you train with your phone in hand. The difference is where the logging happens: Hevy is phone-first, and native, phone-free logging on a Garmin watch is not its focus, whereas Rack syncs your routine to the watch over Bluetooth so you log every set from the wrist alone, then writes the session into Garmin Connect over FIT.

• Pick Hevy if: you mostly lift with your phone out and want a big library and social feed, with Garmin as a secondary destination.
• Pick Rack if: you want to leave the phone in your bag and log from a Garmin watch, with the workout landing in Garmin Connect next to your runs.
• Pricing: Hevy has a free tier with Pro at about $4.99 per month, $39.99 per year, or $74.99 lifetime; Rack is $54.99 per year or a $119.99 founder lifetime.

Rack vs KeepStrong

KeepStrong is a Garmin strength app known for a broad exercise-demo and animation library at a low price, with a companion phone app. Its English localization has historically been a weaker point. Both run on Garmin; the difference is emphasis. KeepStrong leans on its exercise-demo library, while Rack focuses on accurate confirmed logging, progression, and clean BLE plus FIT syncing into Garmin Connect.

• Pick KeepStrong if: a large exercise-demo library at a low price is your priority, and localization is not a dealbreaker.
• Pick Rack if: accuracy of the logged numbers, progression and Garmin Connect syncing matter more than the size of the demo library.
• Pricing: check KeepStrong’s current price on the Garmin Connect IQ Store; Rack is $54.99 per year or a $119.99 founder lifetime.

How they compare at a glance

• On-wrist phone-free logging: Rack yes; Garmin native partial (timer only); Hevy no; KeepStrong partial, verify for your watch.
• Stores weights and exercise names: Rack yes; Garmin native no; Hevy yes (on phone); KeepStrong yes.
• Confirmed sets vs estimated reps: Rack confirmed; Garmin native estimated; Hevy confirmed (on phone); KeepStrong varies.
• Writes to Garmin Connect over FIT: Rack yes; Garmin native yes; Hevy limited; KeepStrong verify.
• Progression that remembers last week: Rack yes; Garmin native no; Hevy yes; KeepStrong varies.

Which should you pick

If you want a free timer and nothing more, Garmin native is already on your watch. If you lift mostly with your phone in hand, Hevy is a strong logger. If you want the biggest exercise-demo library cheaply on Garmin, look at KeepStrong. And if you want to log full sets from the wrist, phone-free, with accurate numbers and clean syncing into Garmin Connect, that is exactly what Rack is built for.

Frequently asked questions

Is Rack or Hevy better for Garmin users?

For phone-free logging on a Garmin watch, Rack is the better fit; for phone-first logging with a large library, Hevy is. Hevy is a polished phone logger, but it is not built around logging from the wrist on a Garmin, while Rack syncs your routine to the watch and writes the finished workout to Garmin Connect over FIT.

Is the Garmin native strength app good enough?

Garmin’s native strength mode is good enough only if you just want time, heart rate and calories. It does not store the weight you lifted or your exercises, so there is nothing to progress against; for real strength tracking you need a dedicated app like Rack.

Which strength app gives the most accurate numbers on Garmin?

Apps that have you confirm each set give the most accurate numbers, because wrist-motion auto detection miscounts on movements where the wrist barely moves. Rack uses confirmed set entry, so the weights and reps in your history are the ones you actually lifted.

Bottom line

Rack versus the alternatives comes down to where and how you log. Garmin native is a free timer, Hevy is a strong phone-first logger, and KeepStrong is a cheap Garmin app with a big demo library. Rack is the one built for accurate, phone-free, on-wrist strength logging that syncs cleanly into Garmin Connect, so if that is your priority, it is the pick.