Different stores require different apps
Try out apps and see if they are right for your store. This takes time. I suggest only one app at at a time.
2 Apps that are a must for social proof and scarcity :
Fomo - https://www.usefomo.com/
https://apps.shopify.com/fomo
Hurrify - https://apps.shopify.com/hurrify-countdown-timer
If you are printing on demand:
...
https://www.youtube.com/watch?v=J3HW4WLUxfw
You can checkout Exodus Eden here:
https://www.exodus.io/eden
This software is unsupported by Exodus. Only use if you are an Advanced user of Crypto.
Want to Buy Bitcoin?
My personal invite link to Coinbase to get free Bitcoin
https://www.coinbase.com/join/58c7ec192bf9c10be80958da
...
https://www.youtube.com/watch?v=ViOvWcIDaqc
Twin brothers who sued Mark Zuckerberg claiming he stole the idea of Facebook just became Bitcoin Billionaires
How did I learn about ICO's?
https://garthscaysbrook.com/ico-gold-rush-is-now-live/
...
https://www.youtube.com/watch?v=nUL9Pdn1mJs
Want to buy Bitcoin?
My personal invite link to Coinbase to get free Bitcoin
https://www.coinbase.com/join/58c7ec192bf9c10be80958da
...
https://www.youtube.com/watch?v=h2WAErGlUTc
Is Envion a Scam?
https://envion.org
How did I learn about ICO's
https://garthscaysbrook.com/ico-gold-rush-is-now-live/
...
https://www.youtube.com/watch?v=jRVTjiUH0G8