Try researching those projects with shorter work units that focuses on CPU, one of them would be World Community Grid. Basically, as long as you own a CPU, even using current phone (try searching BOINC in AppStore, but not recommended to do on daily phone, given the heat dissipated is a lot and reduce your phone life span) also can contribute in researching. You can look at the below link to find out all the whitelisted list.
https://www.gridcoinstats.eu/project
Happy Boincing and Gridding.
You can use a temperature limit in the app itself for that , so no problem.
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Ahh, missed your reply sorry. Saw it on time to still upvote you :-)
OK will start with World Community Grid first.
And have lots of reading to do ;-)
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