The best replacement for protune is cobb stage 2.

The best alternatives to protune are rated as following:
★★★★★  cobb stage 2
★★★★★  accessport
★★★★  cobb ots
★★★★  etune
★★★  no protune gopro

Your alternative for protune is not listed? Suggest!
Speaking about protune, one probably shouldn't forget about accessport.

Other search terms related to protune and their ratings are:
★★★★★ accessport
You have in mind a companion for protune and it is not yet here? Propose!



Google Trends

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protune
cobb stage 2
accessport