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An incoming call can only be logged if Nexicall was open when it ended. Here is why, and what a phone does and does not let an app see about your calls.

Android battery savers, and a separate autostart permission on some brands, delay or drop reminders. What to change on Samsung, Xiaomi, Huawei and Oppo phones — and what else causes it.

Nexicall syncs both ways with the address book on your phone, including several numbers per person. What syncs, what happens when both sides change, and why a deletion is never automatic.

Nexicall takes how long each call lasted from the phone instead of asking you to estimate it, and stores it in minutes and seconds. How it is measured, why it can be approximate, and how to correct it.