Massiv lets Apple Watch and Wear OS users log gym sets without their phone

The wrist-first strength app queues workout data when a phone is out of range, then syncs completed sets when the connection returns.

Strength logging is often the weakest point in a gym session. For runners and triathletes who already track pace, distance and recovery, the friction of entering every set can be enough to cause gaps in the record. Massiv, a self-funded strength-training app from developer Alan and published by Aristocoded LLC, is aimed at removing that friction by shifting the working part of the lift to the watch rather than treating the watch as a remote control for the phone.

According to the product description and app listings, Massiv supports iPhone, Apple Watch, Android phones and Wear OS watches, with the session started on the phone and then mirrored to the wrist. Once that hand-off has happened, the watch becomes the main training interface: it shows the current exercise, the set number, the most recent result for that movement and the target weight and repetitions for the next lift. The app also includes rest timers, one-tap set logging, automatic progression and a plate calculator for users who pay for the Pro tier.

The key technical point is that Massiv does not require a constant phone connection during the workout. The watch can continue to log sets even if the phone is in a locker, a gym bag or simply out of Bluetooth range, and queued entries are sent back to the phone once the connection returns. That makes the app closer to a genuine wrist-first logging system than many fitness-watch companion apps, which still depend on the handset for each entry. The company says the watch workflow also preserves previous-set context, so lifters can see what they completed last time without digging through menus or unlocking a phone between sets.

The app’s broader feature set is aimed at structured strength training rather than generic gym tracking. Massiv advertises 17 built-in programmes, including common templates such as 5/3/1, GZCLP and PHUL, along with CSV import from services including Strong, Hevy, Fitbod, StrongLifts, FitNotes and Jefit. Apple Watch users can also record heart rate and active calories into Apple Health, while Android users can write completed workouts and body weight to Health Connect. The app does not appear to offer direct integrations with Garmin, Strava or TrainingPeaks, instead relying on its own export options and device-level health sync.

Pricing is split between a free tier and Massiv Pro. The free version includes watch-based set logging, previous-set display, rest countdowns, unlimited history and CSV import and export. Pro, which is priced at $4.99 a month, $29.99 a year or $99.99 once in the US, adds the plate calculator, automatic progression after a free preview period, the programme builder, body and progress photo tracking, deeper analytics and custom exercises. For lifters who want to keep their phone out of the session altogether, the most relevant feature may be the simplest one: the ability to finish a set on the wrist and deal with the paperwork later.