Home Gym
COROS APEX 4 Review: 42mm of Battery Life and Very Little Fuss
An honest COROS APEX 4 (42mm) review covering the MIP screen, 41 hour GPS battery, offline maps, ECG, speaker and voice notes, plus who should buy it and who should not.
About Best Exercise
By Jacob Chambers, Founder & Lead Reviewer · Updated 26 June 2026
Best Exercise is an independent UK resource for honest fitness equipment reviews and buying guides. We started with a simple frustration: most "reviews" online are thin, recycled, or quietly paid for, and they rarely help you actually decide.
What we do
We research and review the home fitness kit UK buyers are actually searching for, such as treadmills, exercise bikes, rowing machines and cross trainers, plus the nutrition and supplements that support training. Every guide is written to answer a real question: is this worth your money, and is there something better?
How we keep it honest
- Independent rankings. We are not paid by manufacturers to feature or rank products.
- Affiliate-funded, not affiliate-led. We earn a small commission if you buy through our Amazon links, at no extra cost to you. That funds the site. It never changes our verdicts.
- We say when something isn't worth it. A review that can't say "no" isn't a review.
If you spot something we've got wrong or out of date, we want to know. Head to our contact page.
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Best Exercise is a participant in the Amazon EU Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.co.uk. As an Amazon Associate we earn from qualifying purchases. This comes at no extra cost to you and never influences our independent reviews or rankings.