Home culture plate analysis
See what grew. Understand what it means.
Photograph your culture plate in the Petri Studio app and get a plain-language read of what's on it. Each result is saved to its room, so next time you can see what changed.
- App coming soon
- Works with compatible settle plates
- First analysis free, no kit required
For informational use. Not a substitute for professional inspection or medical advice.
Room history
A result is more useful when you can see what changed.
Tag each plate with the room it came from. The app keeps the dates, photos and earlier results together, so your next test in that room has something to compare against.
- See the percentage change since your first test
- Repeat the same room after cleanup or repairs
- Look back at prior plate photos and reports
Why Petri Studio
Most home test kits stop when the plate starts growing.
That's when the real questions start. What am I looking at? Is the basement worse than the bedroom? Should I do something about it?
| A typical DIY kit | Petri Studio | |
|---|---|---|
| What you do | A typical DIY kitExpose the plate. Wait. Count colonies. | Petri StudioPhotograph the plate in the app and get a plain-language read of what grew. |
| What you get | A typical DIY kitA number you interpret yourself, plus an internet search. | Petri StudioAn explanation of what's visible on the plate, and what it can't tell you. |
| What happens next | A typical DIY kitNothing. The kit is used up. | Petri StudioThe result is saved under that room, with the date. |
| What you keep | A typical DIY kitA photo on your phone. | Petri StudioA room history you can compare against the next test. |
How it works
Four steps, and most of it is waiting.
- 01
Expose
Open the plate in the room you want to test. With the Petri Studio kit, leave it out for 1 to 2 hours, then close it.
- 02
Wait
Keep it closed at room temperature for 3 to 5 days. The app reminds you when the plate is ready to photograph.
- 03
Capture
Photograph the plate through the lid in the app. Don't open it.
- 04
Understand
See what the app found, save it to the room, and read what it suggests doing next.
Plate compatibility
Use a compatible settle plate you already have.
You don't need our kit to try the app. If you already have a compatible settle plate, photograph it in Petri Studio and save the result to the room it came from.
Analyze your first plate free- Works with compatible plates from other brands
- Your first one is analyzed free
- Results are saved by room and date
For the best read, keep the lid on and shoot straight down in even light.
The kit
Enough to test six rooms, with the analysis already paid for.
Six culture plates, each with its analysis included. Test the rooms you're worried about, and every plate becomes a saved result you can come back to.
- Six pre-poured culture plates
- Gloves and instructions
- Code for six plate analyses
- Free room and result history
Petri Studio Guided Mold Screening Kit
$34.99six plates and six analyses included
Every kit comes with a code that unlocks six plate analyses in the app. You won't need to buy anything else. Kits ship when the Petri Studio app launches, so the two arrive together.
Pricing
Your first analysis is free. After that, buy analyses in packs.
Using a plate from another brand? After your free one, buy analyses in the app, one at a time or in packs. There's no subscription, and our kits already include analysis for all six plates.
- First outside plateFree
- 1 analysis$5.99$5.99 each
- 3 analyses$14.99$5.00 each
- 6 analyses$24.99$4.17 each
Each pack is a one-time purchase, made in the app. This site doesn't sell them.
Plates and analyses together
$34.99
Six culture plates plus a code for six analyses, so every plate in the box is already paid for.
Helpful context, not a diagnosis.
Keep it closed
Never open a developed plate. Photograph through the lid and dispose of it as directed.
Read what is visible
The app describes what it can see on the plate and what that usually means. It doesn't identify species.
Know when to call someone
Damp that won't go away, growth that keeps spreading, or symptoms that worry you are worth a professional's opinion.
Get the app
Analysis happens on your phone.
The app is almost ready. Leave your email and we'll send you the link on launch day. Your first plate from another brand is analyzed free, and you won't need a card.
Coming to iPhone and Android
On launch day there'll be a QR code here. Point your phone's camera at it to find Petri Studio in your app store.
Start with the settle plate in front of you.
- Already have a compatible settle plate? Analyze it in the app.
- Need a complete setup? Start with the Petri Studio kit.