Android: Rep Max Calculator is an easy way to determine a RM in the 1-12 range.
Yes, yes, I know, real men & women do test true RMs, but it is still fun to geek out about rep maxes when nobody is looking, right?
Get it here: Google Play
- Available Rep Max Formulas: Epley, Brzycki, Lander, Lombardi, Mayhew et al., O’Conner et al., Wathan and an option to take the average of them all
- enter the weights for a rep max and it calculates the other rep maxes
- supports kg (not as default) and another weird unit called lbs
The app itself works flawless. However as you might have guessed these formulas will only five you a rough estimate, since they do not distinguish between exercises / bodyweight.
The degree of accuracy can vary largely depending on the weight training experience and muscular composition of the athlete.
For me Brzycki comes closest for Squat, Deadlift & Bench (although Epley although came close). For Press O’Conner et al was the most accurate.
I don’t know of a comparable iPhone app, but you guys can try strstd.com (which is always overly optimistic when it comes to my predicted maxes).
Try it yourself and use with caution.