CallKit and CallDirectoryHandler extension limits

App & System Services General
Natali_S OP
Created Jun ’21
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Can you please explain how many numbers can be written to one CallDirectoryHandler? I've tried to write to test app - and I managed to write 1 999 999 numbers.

To my existing app I managed to write only 1 000 000 numbers, but they were all with different length. If the phone numbers are the same length (11 symbols) - I managed to write 1 500 000 numbers.

What does it depends on?

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slzh OP
Jun ’21

In the past I've managed to write several million numbers.

An issue I faced at the time was that loading all the numbers exceeded the memory limit in the extension.

It was necessary to add them in smaller batches.

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CallKit and CallDirectoryHandler extension limits
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