Both conventional and smartphone app-based pedometers are said to be valid and reliable for measuring footsteps, but there is still very little evaluation of their use. We aimed to assess the accuracy of conventional and smartphone app-based pedometers for measuring steps count among healthy adults. The search for studies was carried out on four databases: PubMed; Cochrane Library; Science Direct; and Pro Quest, during June 2020, with a combination of keywords based on Boolean logic-commands, including: pedometers; population (healthy adults); and context (footsteps). Total of 1768 articles were identified and selected based on population, intervention, comparison and outcome (PICO). After eligibility assessment, there are 6 articles were met the inclusion criteria and were included for qualitative synthesis. The results show that the accuracy of conventional pedometers and smartphone app-based pedometers depends on the type and brand of each device, and how it is used (running or walking at different speed). Pedometers generally also measure other physical activities such as distance traveled or calories burned, so that the accuracy of the device is not limited to footsteps. Furthermore, systematic reviews and meta-analyzes with broader outcomes such as overall physical activity are recommended.