Has been a clarion developer since the DOS days. The following are the products using purely clarion:

1. ERP system for Property Developers
2. Construction Management System
3. Accounting System (OE, IC, AR, AP, GL)
4. Snooker Light Control with POS (I2C)
5. POS for Saloon
6. POS for Gym
7. POS for Restaurant N Kitchen
8. POS for General Retail
9. Online Retail Chain System
10. Online Automotive Workshops
11. 10+ types of Online MLM system
12. Online Payroll System
13. Desktop Payroll System
14. Desktop Workshop System
15. Production Monitoring (iButton+C)
16. Jewellery Sales Inventory System

With Clarion, only one programmer is hired to maintain all the above products.
We are currently using flutter to develop android/ios apps for use as a front-end tool to communicate with our rest api. Leveraging on Clarion11 JSON capability to integrate to our open source database we manage to scale clarion to a higher level.