3D Print Failure Detection with an Old Phone — No OctoPrint, No Raspberry Pi

A failed print you notice 6 hours late costs you a spool of filament and a full day. A spare phone on a tripod and one sentence in plain English can catch it in minutes.

The problem with "just check on it"

Long prints fail at the worst moments: bed adhesion lets go at hour 2 of 9, the nozzle clogs and prints air, or the whole thing turns to spaghetti overnight. Classic webcam streaming (OctoPrint, Klipper + camera) works — but it needs a Raspberry Pi, setup time, and it still relies on you watching the stream. Motion detection doesn't help either: the print head moves constantly, so everything or nothing triggers.

How AI watching is different

AI Vision Monitor uses a vision AI model that actually understands what it sees. You point a camera at the printer and write the trigger yourself, in normal language:

"Alert me if the print has detached from the bed or the extruded plastic looks like spaghetti."
"Notify me if the printer has stopped moving or the display shows an error."
"Tell me when the print looks finished."

The app checks the scene at the interval you choose and remembers previous frames for context — so normal head movement never wakes you up, but a detached print does.

Setup in 3 minutes

  1. Mount any spare phone (even a 5-year-old Android) on a tripod or clip, with a clear view of the bed. Plug it into a charger.
  2. Install AI Vision Monitor and describe your failure scenario in one sentence — any language works.
  3. Pick a check interval — every 2 minutes is plenty for most prints — and start monitoring. Alerts arrive as push or email.

What does an 8-hour print cost to watch?

With a light AI model (0.5 credits per check) and a check every 2 minutes:
240 checks × 0.5 credits = 120 credits ≈ €0.15 per 8-hour print on the €2.50 starter pack.

New users get 50 free credits — enough to watch your next print end-to-end before paying anything. No card required.

What makers use it for

Get it on Google Play iOS Beta (TestFlight)

FAQ

Do I need OctoPrint or Klipper?
No. Any spare Android phone or tablet is the whole setup. No printer integration, no Pi.

Will the moving print head cause false alarms?
No — this isn't motion detection. The AI evaluates your described event against the scene, with up to 5 previous frames as context.

Does it work offline?
The phone needs internet: analysis runs server-side, which is exactly why ancient devices work fine.

Can it replace Obico?
Different tool. Obico integrates with your printer's firmware; AI Vision Monitor is the zero-setup option when you have a spare phone and want alerts in 3 minutes — for the printer and for anything else you point it at.