Grumpy Old Tech Robot Control vs Hollow

This App is used to control the Grumpy Old Tech Self Balancing Robot. Check out Grumpy's website for instructions on how to build the robot and view his YouTube videos for an explanation of how it all works. If you have any questions leave a comment on how Facebook or Youtube channel. Good luck with your build!!!

Something just moved. Did you feel it? Hollow turns your iPhone into a beautifully crafted paranormal field kit — and unlike the cheap, ad-stuffed ghost apps out there, it's made with care. THE TOOLKIT • K2 / EMF Meter — the lights spike when something's near • Spirit Box — sweep the frequencies and listen for words • EVP Recorder — capture the voices you can't hear • Sound, vibration & pressure — feel the room react • SLS Camera — catch skeletal figures moving in the dark • AR Ghosts — watch spirits appear in your actual room, then record it SMART EVIDENCE Hollow connects every sensor. When the K2, pressure and sound spike together, that's a confirmed event — and your hunt earns a shareable report. MADE TO SHARE Film the AR ghost in your living room. Catch a stick figure on your couch. The eerie moments are made to post. HONEST FUN Hollow is an entertainment experience — a gorgeously made spooky toy, not a real paranormal detector. No ads, ever. — Hollow Pro — • Lifetime — $19.99 one-time • Yearly — $9.99 (3-day free trial) • Weekly — $1.99 Unlocks full AR & SLS, EVP recorder, every skin, hunt reports and export. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period; manage or cancel anytime in your Account Settings. Prices are in USD and may vary by region. Terms of Use (EULA): https://hollow.pandasroom.top/terms.html Privacy Policy: https://hollow.pandasroom.top/privacy.html