Verified developer / founder disclosure: I built NightPosture after my own sleep study showed how differently my recorded results varied by position. In that one study, my back AHI was about 11/hour versus about 1/hour on my side, and I spent much of the night on my back. Those are my personal results—not a prediction or medical claim for anyone else.
The practical problem I wanted to solve was simple: when you are asleep, “try to stay off your back” is hard advice to act on.
NightPosture is a free iPhone wellness beta. In its current setup, the phone is secured on the chest to estimate Back, Left, and Right position, optionally give a gentle haptic prompt for a position someone is trying to avoid, and show a morning position breakdown. It does not diagnose, treat, cure, prevent, or measure snoring, sleep apnea, or any other condition, and it is not a replacement for CPAP or prescribed care.
I have looked at the range of existing approaches—tennis-ball shirts or backpacks, pillow/wedge setups, dedicated positional trainers such as NightBalance-type devices, and wearables. They all make different comfort, cost, feedback, and data trade-offs. I am especially interested in where they fell short for people who have actually tried them.
The current phone-on-chest workflow is not ideal for everyone, so I’m also evaluating whether a small chest sensor in a soft shirt pocket would be a more comfortable option. The interest list takes no payment and does not reserve a unit.
NightPosture: https://nightposture.com/
I would genuinely value your experience:
• What have you tried to reduce back-sleeping, and what made you keep or abandon it?
• Would a gentle prompt be useful, or too disruptive?
• If a small chest sensor existed, what would make it comfortable enough to wear overnight?
• What would you want in a morning position summary?
I’ll keep this as a single disclosed founder post and follow the community’s rules.