iPhones prior to the iPhone 6S do not need adhesive. There are some pre-cut adhesive kits available on [product|IF314-049|iFixit] and other websites. You''ll also find similar kits for other models and Android phones.
If you don't want to buy pre-cut kits, you can get [product|IF317-072|Tesa Tape] and cut to length. This saves money but takes more time and when the adhesive also doubles as water resistant seal, you're better off with pre-cut.
The same applies to iPads. Don't use the tape that comes pre-installed on most digitizers, it's usually garbage. You can get pre-cut tape from [https://bowlertech-adhesives.com/|BowlerTech]; they use 3M tape but it works really well too.