Hardware & software:
- Grammarly at https://www.grammarly.com for free from Andy Ihantko.
- “Tuck a 20” Tip (stick a $20 between the back of your phone and the case) for free from Kelly Guimont.
- Oragami Stars at https://origamiway.com/origami-lucky-star.shtml for free from Kelly Guimont.
- iOS Apprentice (book) for $50.70 (Amazon Affiliate Link) from Janie Clayton.
- The Swift Apprentice (book) for $47.96 (Amazon Affiliate Link) from Janie Clayton.
- Hacking with Swift at https://www.hackingwithswift.com for various from Janie Clayton.
- Cooling Packs for $11.95 (Amazon Affiliate Link) from Oliver Breidenbach.