Rowing machines are more than capable of making your body stronger. The fitbill f.row is a Bluetooth enabled rower that monitors your workouts. It also has a magnetic phone holder. The companion app shows distance, time row rep/count, and calories.
The machine is capable of accommodating users up to 300lbs. It has anti-slip foot pedals and a fully padded seat. Costs under $100 at this time.[where to find it]