- Photosync - Handles transfers of photos and videos from the phone to any platform you can think of with ease, can automatically convert HEIC and HEVC files to jpg and mp4, can rename in multiple formats or make your own (I name mine as YYMMDD-HHMMSS). Probably my favorite app ever. A total media swiss army knife.
- Goodreader - For reading any kind of document or consuming media files. Supports using extra AES file encryption on top of regular Apple encryption.
- Layout - Good for making small photo layouts for posting to social media
- Tailor - Stitches screenshots together into a single large photo
- Censor (App store link is down, probably because they haven’t updated their privacy policy yet). Allows you to obscure faces or any other information you want to redact from photos.
- Signal, because it’s an awesome and secure messaging app for people without iPhones.
Those are my most commonly used apps that aren't "big names".