Bowflex kettlebell or BRAINGAIN dumbbells: which home gym buy wins?

Display / Functionality

Winner: BRAINGAIN

There is no screen or display on either product, so the real comparison is functionality. The Bowflex is an 18.1 kg adjustable kettlebell with a quick-select weight mechanism, which is excellent for kettlebell-specific movements but limited in scope. The BRAINGAIN set is a pair of adjustable dumbbells up to 24 kg each, giving you far more exercise coverage for presses, rows, curls, lunges and floor work. If you want one product to cover more training styles, the dumbbells win decisively.

Performance

Winner: BRAINGAIN

Performance here means how much training you can do before the equipment becomes the limiting factor. The Bowflex kettlebell tops out at 18.1 kg, which is plenty for swings, deadlifts and higher-rep conditioning, but it will be outgrown sooner for lower-body strength and heavier upper-body work. The BRAINGAIN pair reaches 24 kg per dumbbell, so you get a much higher ceiling for progressive overload and a more complete strength program. For pure training versatility and long-term progression, BRAINGAIN is the stronger performer.

Build Quality and Design

Winner: Bowflex

Bowflex has the cleaner, more established design pedigree. The SelectTech kettlebell is compact, well-finished and purpose-built, with a simple adjustment system that feels premium and reduces clutter. At 4.7/5 from 9,612 reviews, it also has the stronger reputation for user satisfaction and proven reliability. BRAINGAIN’s dumbbells are practical and include useful features like a secure locking system, non-slip grip and storage dock, but the brand has fewer reviews and a slightly lower 4.6/5 rating from 1,219 reviews. If you value refinement and a more trusted product ecosystem, Bowflex wins on build confidence.

Battery Life

Winner: Tie

Neither product uses batteries, so this category is not relevant. From a home-gym perspective, that is actually a plus: no charging, no electronics, and no downtime. Both are low-maintenance in the best possible way.

Price and Value for Money

Winner: BRAINGAIN

The Bowflex costs £179.95, while the BRAINGAIN pair is £219.99, a difference of £40.04 in Bowflex’s favour. However, value is not just about upfront cost. For that extra spend, BRAINGAIN gives you two adjustable dumbbells, a 24 kg max per hand, and a storage dock, which is a far bigger training return than a single adjustable kettlebell. If your goal is the most capability per pound, BRAINGAIN is the better value despite the higher price. Bowflex is cheaper, but it is also a narrower tool.

Game Library / Features

Winner: BRAINGAIN

Interpreting this as exercise library and feature set, BRAINGAIN wins easily. Adjustable dumbbells are the backbone of a full home gym because they support a far wider range of movements than a kettlebell: bench work, overhead pressing, single-arm rows, split squats, lateral raises and more. The Bowflex kettlebell is excellent for kettlebell training patterns, but its feature set is inherently more specialised. BRAINGAIN’s quick-change weights, secure locking system and included dock make it the more complete package for most users.

Overall User Experience

Winner: BRAINGAIN

The Bowflex is the better experience if you want something simple, compact and easy to store for kettlebell conditioning. It is likely the more polished single-item purchase, and its huge review count suggests it has earned trust over time. But for most home gym buyers, the BRAINGAIN dumbbells deliver a far more satisfying day-to-day training experience because they unlock a fuller workout library and grow with you longer. The only real downside is the higher price and larger footprint compared with a single kettlebell. If space is tight and your training is kettlebell-centric, Bowflex makes sense. If you want the more complete home strength solution, BRAINGAIN is the stronger buy.

Overall summary: Bowflex wins on brand trust, refinement and lower upfront cost, but BRAINGAIN wins the comparison where it matters most for a home gym: versatility, progression and total training value. Unless you specifically want a kettlebell-only solution, the BRAINGAIN adjustable dumbbells are the definitive recommendation.