KNOW THE PHONE IN YOUR HAND
A closer look.
A clearer choice.
Check your iPhone’s everyday hardware before buying used, after a repair, or when something feels off.
Guided checks for iPhone. Available tests depend on your device and permissions.
Every detail. Worth a check.
01 / Tools
Start with what you can see.
Two small browser tools. No install, no camera or microphone permission, and nothing to upload.
02 / CHECKUNO FOR IPHONE
More checks, on your iPhone.
Checkuno brings guided checks for display and touch, cameras, audio, motion sensors, connectivity and everyday functions into one iPhone app. Quick Test offers a starting point; individual checks help you investigate a specific symptom.
A check is an observation, not a certification. Results do not establish authenticity, water resistance, remaining lifespan or the absence of hidden damage.
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01
Prepare the phone
Remove accessories that could interfere. Choose a quiet, well-lit place.
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02
Try the function
Follow the instructions and confirm what you can see, hear or feel.
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03
Review the evidence
Repeat unexpected results under the same conditions before drawing conclusions.
03 / Guides
One phone. Better questions.
Practical checklists that explain what to try, what to look for, and what a result can actually tell you.
How to check an iPhone screen
Use solid colors to inspect visible pixel issues, tint and display uniformity, then separate screen symptoms from software and accessories.
Read guide →02 / TOUCHHow to check iPhone touch response
Draw across a touch canvas, repeat missed areas and isolate accessory or software interference before assuming hardware damage.
Read guide →03 / AUDIOHow to check an iPhone microphone
Compare a short voice recording, camera clips and call behavior while checking permissions and audio routing.
Read guide →04 / BUYING USEDA practical used iPhone inspection checklist
Inspect account status, physical condition and everyday hardware before agreeing to buy a used iPhone.
Read guide →A little context helps.
Can a website fully diagnose an iPhone?
No. Browser tools can show colors and receive touches inside the page. They cannot inspect every component, access Apple service diagnostics, verify genuine parts or certify a device.
Are Checkuno checks automatic?
Some checks observe a device response, while others need your input or confirmation. Available functions depend on the model, iOS version, permissions and accessories.
Is Checkuno an Apple service?
Checkuno is an independent app by TomatoPeter Studio / Jun Pan. It is not affiliated with or endorsed by Apple.
Are all app checks free?
The app includes a starting set of checks and offers Pro access through in-app purchase. See the current App Store listing and in-app purchase screen for availability, prices and terms.