FIG. 1 depicts one embodiment of a system 100 for on-device feature and performance testing and/or adjustment. In one embodiment, the system 100 includes one or more devices 102 (e.g., hardware devices such as mobile hardware devices, virtual devices, simulated devices, and/or the like), one or more feature adjustment modules 104 (e.g., one or more feature adjustment modules 104 and/or a plurality of feature adjustment modules 104 disposed on the one or more devices 102), one or more data networks 106 or other communication channels, and/or one or more third-party service providers 108 (e.g., one or more servers 108 of one or more service providers 108; one or more cloud or network service providers 108, or the like). In certain embodiments, even though a specific number of devices 102, feature adjustment modules 104, data networks 106, and/or third-party service providers 108 are depicted in FIG. 1, one of skill in the art will recognize, in light of this disclosure, that any number of devices 102, feature adjustment modules 104, data networks 106, and/or third-party service providers 108 may be included in the system 100 for on-device feature and performance testing and/or adjustment.