Maybe a tiny vibrating device can remind you to sit up straight once and for all.
Upright Posture Trainer & App Review
WHAT IS UPRIGHT? This tiny device gives you gentle vibrating reminders when you slouch. You slouch because you forget to stay up right (we all do);
Upright GO 2 Premium | Posture Corrector Trainer & Tracker for Women & Men with Smart App
Upright Go S review: This $70 device vibrates as you slouch - Gearbrain
家電・スマホ・カメラUPRIGHT GO 2 - その他
Upright Go 2 Review: A Posture Trainer That Works
A posture trainer works, if you want it to
UPRIGHT GO 2 - 通販
Data-Driven UPRIGHT GO 2 Review By Skeptical Engineers
Upright GO 2 sale: Save 25% and fix your posture
家電・スマホ・カメラUPRIGHT GO 2 - その他
Upright Go S review: Posture trainer
Upright GO2 Posture Trainer Review (2024) – Forbes Health
Upright Go 2 review: a guide to better posture but you'll need to do the hard work yourself
Upright GO 2
Upright Go review: a really annoying gadget which I recommend - 9to5Mac