We love that you want to share tapping with others! While we do not currently have the option to purchase a gift subscription to the App to share, we are exploring having that feature in the future.
In the meantime, you can purchase an App Store or iTunes gift card that could be given as a gift for those with a compatible iOS device or a Google Play gift card for those on Android. Please note, some purchases do require that you have a credit card on file even if you are using store credit.
For more information on how to redeem App store and iTunes gift cards, you can find the details on the article here - https://support.apple.com/en-ca/HT201209
For more information on how to redeem a Google Play gift card, you can find details in the article here - https://support.google.com/googleplay/answer/3422659?hl=en