Measuring
How accurate is it?
Accuracy depends on a good calibration and a sharp, flat photo. Every counted thread is marked on the photo, so you can check any result yourself and recount a chosen area if needed.
Which fabrics does it work on?
Almost all woven fabrics: plain, twill and denim, satin and sateen (including polyester satin), checks and stripes, and slubby or handloom fabrics. Knitted fabrics are coming in an upcoming upgrade, measured in wales per inch (WPI) and courses per inch (CPI).
Can it count polyester satin?
Yes. Polyester satin is one of the hardest fabrics to count by eye, because long glossy floats hide the interlacings. A dedicated satin method reads the satin weave itself, then counts and marks every end and pick.
How does a phone photo give measurements in real inches?
During a one-time set-up, the app photographs our printed chessboard sheet to measure your camera's lens distortion and to learn how its focus relates to distance. After that it corrects the distortion in every photo and works out how far away the fabric is, so counts are per true inch and GSM areas are true square centimetres. Calibration files for popular phones will also be available in the app.
Can it replace my GSM cutter?
For most samples, yes. The app measures the exact area of a piece of any shape from a photo, so you don't need a perfectly cut circle. You still need a weighing balance. If you already use a GSM cutter, you can enter the weight directly.
Getting started
Does it need the internet?
Yes. Counting runs on our servers, so you need mobile data or Wi-Fi. Calibration works without a connection.
Which phones are supported?
Most Android phones with Android 10 or newer.
Do I need special hardware?
No. Our printed calibration sheet is all you need to set up. A phone stand is recommended for the best results, but if you can hold the phone still you can also photograph the fabric by hand. For GSM you also need a weighing balance.
Is there a free trial?
Yes, start a free trial in the app. If you need more time to evaluate, you can request an extension from inside the app.
Can my whole team use it?
Yes. Company plans cover several devices and custom durations, priced by quotation. Contact us.
Data and account
What happens to my photos?
They're sent to our servers only to compute your result. The photo and its working data are deleted automatically within 5 minutes, or sooner. Analysed images, results and saved projects are kept only on your phone.
How do I delete my account?
In the app, go to Settings › Account › Delete account. Delete your account explains the steps, including what to do first if you have an active subscription or company plan.
How do I get support?
Email support@kelwerk.com, call +91 87002 38266 (Monday to Saturday), or use Contact support inside the app.