Being mainly aimed at low-end market segments, all models in the series have the essential features of a standard entry-level smartphone, and differ in size and design.

(Li-Ion) Android 9.0 (One UI)(Verizon & TracFone) (≈267 ppi) 4x 1.4 GHz Cortex-A53 @830 MHz

eMMC 5.1 (Li-Ion) (Samsung Experience) (One UI) India: Galaxy On6 (≈293 ppi) 8x 1.6 GHz Cortex-A53 @700 MHz

eMMC 5.1 (Li-Ion) (Samsung Experience) (One UI) (≈274 ppi) 4x 1.4 GHz Cortex-A53 @500 MHz

eMMC 5.1 (Li-Ion) (TouchWiz) (Samsung Experience) Galaxy On NxtGalaxy On Nxt (≈401 ppi) 8x 1.6 GHz Cortex-A53 @700 MHz

5 MP, f/1.9, (Depth) (Li-Ion) (Samsung Experience) Galaxy On7 Prime (2018) 8x 1.6 GHz Cortex-A53 @700 MHz

The 2019 lineup also introduced Samsung's new naming scheme, with two-digit numbers as opposed to single digit of previous generation models.