Calcomera is a set of free internet and device checks in your language. Our task is to help reproduce the problem, understand the result and choose the next step.
How materials are arranged
The articles were prepared by the editors of the project: a specific symptom, reproducible actions, a working test and an explanation of the limitations. Technical definitions are checked against browser API documentation and standards. We do not pass off the described scenarios as laboratory tests of devices and do not invent expert certificates.
The date in the article indicates its preparation or substantive update. The technique is available on a separate page. If you notice an error, please send the page address and sequence of actions via project contacts.
Who does the site work for?
For Russian-speaking users, regardless of country. We do not have fictitious branches and separate copies of the same page for each city. Network latency depends on the path to the measuring node; compare it taking into account connection and distance.
How the project is supported
Advertising spaces are separated from test buttons. Checks require no purchase and are available by rejecting optional cookies. More details - about advertising.