King Checkout Validation
Checkout & address validation for VAT, phone, and order limits
Rating
5.0
feedback
16
chart
#2,866
All reviews
Review RSS Feed
May 10, 2026
Support was responsive and quickly implemented support for validating a new early access Shopify field to collect a required ID number in certain countries. Really appreciate the fast turnaround.
May 7, 2026
Exactly what we we're looking for, since we can't use the checkout blocks as we're not on Shopify Plus.
May 7, 2026
App funktioniert wunderbar, der Support ist schnell und zielführend, haben 2 Funktionen angefragt, die innerhalb kürzester Zeit einprogrammiert wurden (Rules für billing address, war vorher nur für shipping verfügbar).
Jan. 27, 2026
Incredible service. Had the app for 5 minutes, and needed a custom feature/rule which wasn't included. Gordon from support created my new feature within 30 min.
Sept. 12, 2025
This app really saved us. We have an integration with SAP, and some fields have character limits that can’t be changed. This app solved that issue, and we also used it to block sending orders to certain islands via ZIP code rules — which works perfectly. I highly recommend this app. We’re running it on eight stores now.
July 25, 2025
This is a fantastic product and the developer is extremely responsive and helpful! Great app!
June 19, 2025
Great app for controlling the checkout process with custom rules! We mainly use it to block specific ZIP codes and set character limits in fields before the data gets pushed to Shopify — and it works exactly as needed. What really stands out is the support team. When we first ran into an issue with ZIP code blocking, they quickly developed a new feature that supports both prefix and suffix rules. Later, when we needed to block something else, they genuinely tried to help — even though it turned out to be a limitation on Shopify’s side, not theirs. Highly recommended if you need more control over your checkout fields and top-notch support behind it.
May 14, 2025
Great app and best support!
Using app
About 1 month
Total reviews
3
Average rating
3.7
March 20, 2025
He is an exceptional developer—truly the best. When it came to the new Shopify field, he resolved it immediately. His expertise and efficiency are truly remarkable. Once again, I would like to express my deepest gratitude for your support and dedication. Your contributions have been invaluable, and I hold your work in the highest regard.
Feb. 10, 2025
Created a new functionality, the day after reaching out on chat for advise on how to setup a feature, and testing the initial solution.
Feb. 6, 2025
The app does its job smoothly and the support team is very quick to answer inquires and to fix issues. Gordon was a great help with the problems we have encountered.
Aug. 20, 2024
Very happy with the app for now! We installed it and works really easy. Also very quick customer service for any question!
Thank you so much for your kind words! We're thrilled to hear that you enjoyed using our app. Your feedback inspires us to keep improving and providing the best experience possible. If you have any suggestions or need assistance, feel free to reach out. Happy exploring! 😊✨
May 22, 2024
Very good app for checkout validation, and the support team is very responsive.