ContactBackUpProX is an application that allows you to easily backup your contacts in txt, vcard, pdf, excel, csv formats and keep your contacts safely.
It backs up your contacts in seconds and doesn't need another server or sync.
Firstly, you need to do is enter your e-mail address on your IOS device
Thanks to ContactBackUpProX,you can backup your contacts with a single touch and you can export your contacts in vcard, pdf, excel, csv, txt formats and keep your contacts safely. You can also save your contacts in your notes, print them, and store them on your computer easily and never lose them
At the same time , you can transfer your backed up contacts to the device.
You will not forget to back up your contacts!
Activate the Notification section of the application and let it remind you for certain times.
If your contacts in your address book are deleted or lost, don't worry! You can reload your contacts by opening the backup file you sent with the IOS mail application.
About Subscription;
ContactBackUpProX allows you to restore your contacts from any of your IOS devices with an auto-renewing subscription for prices that vary by country.
Your payment will be charged to your iTunes Account as soon as you confirm your purchase
Subscription payments will be charged to your credit card through your iTunes account.
Your subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period.
You can manage your subscriptions and turn off auto-renewal from your Apple ID account settings after the purchase.

in App Purchases

Annually = $39.99
Monthly = $ 4.99

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therm of use : http://moon-technology.net/Term/contactbackuppro.html