Are Phone Numbers Safe?

I work in a company and i made an app with all the employees phone numbers so you can just click the persons Name and it calls their phone number.

I was wondering if there is a possibility of those numbers getting in the wrong hands through the app. I dont want all my coworkers numbers to be stolen and getting spam calls.

Are those phone numbers safe?

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If store these info into a TinyDB, then phones without root access can't access this storage.

You can use extensions to detect whether the phone is:

* an emulator
* a rooted device
* or is installed from Google Play, if published there
* and much more ways.

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Don't put the app on google play, get users to sideload, unless you have a domain (G Suite - in which case tick the box for domain users only)

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1. Don't store the numbers in the app.

2. On initial start, use Web component to download the phone numbers from remote server (e.g. php [linking to database] )

3. Don't store the phone numbers in TinyDb, just into global variable

Using above, you have less to worry about. The only issue is that you have to make sure your backend script (e.g. .php) is secure enough to prevent un-authorized access.

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