Hello and welcome to Apple Support Communities, emarias2002.
If I understand your post correctly, you'd like to leave a review for an app from your iPhone but you've been unable to do so. I'm happy to help.
You can write a review and rate an app from the app's description page. The write a review link is right next to the App Support link as shown here:
If you see this issue again, contact the app developer for help:
- Find the app in the App Store.
- Tap the app, then tap Reviews.
- Underneath App Store Customer Reviews, tap App Support.

See the full article here:
If an app you installed unexpectedly quits, stops responding, or won’t open
Let us know if that resolves this issue for you.
Thanks for using the Apple Support Communities. Take care.