4iiii Precision 3+ Pro review - reliable data and handy FindMy integration

4iiii has brought Apple's FindMy technology to its dual-sided Precision 3+ Pro power meter

4iiii Precision 3+ Pro power meter
(Image credit: Future)
Cycling Weekly Verdict

A great power meter with superb accuracy, great in-depth analysis features, useful FindMy security additions - and good value for Shimano crank owners. Battery life is brilliant too, and although some apps can’t display advanced pedalling metrics, that is on them to play catchup with the technology. In all, the 4iiii Precision 3+ Pro was faultless.

Reasons to buy
  • +


  • +

    Very accurate

  • +

    Lots of data

  • +

    Apple FindMy integration

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    Easy to use app

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    Big battery life

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    Decent value

Reasons to avoid
  • -

    Shimano only (for now)

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

4iiii released its first power meter in 2015, debuting its '3D strain gauge technology', which is designed to measure more points of the pedals stroke for greater accuracy.

The Canadian brand was soon supporting some of the biggest sporting teams with Lotto Soudal, British Triathlon, EF Tibco SVB and making the power meters for Specialized which have been used by Quickstep Alpha-Vinal and Bora-Hangrohe. 

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Andy Turner

Andy is a Sport & Exercise Scientist, fully qualified and experienced cycling coach, personal trainer and gym instructor. He spent 3 years on the road riding for a UCI cycling team and 7 years as a BC Elite rider. 


After graduating in 2020 with first-class honours in his Sport & Exercise Sciences BSc, he continued to pursue his interest in research in the field of sport science alongside setting up his coaching business, ATP Performance, and working for USA-based firm, Wahoo Sports Science. He balanced this with racing at international level, competing in prestigious events such as the Tour of Britain and the Volta a Portugal.