FPS Render has render FPS at left-top corner without FPS lost
And it is how it's works: 
The project has github with open source code
PROJECT HAS BEEN RELEASED
Instructions:
- Red - Lowest FPS (<20)
- Orange - Low FPS (>20<=40)
- Yellow - Normal FPS (>40<=80)
- Dark Green - High Normal FPS (>80<=120)
- Lime Green - High FPS (>120<=180)
- Blue - Highest FPS (>180<=240)
- Cyan (Light Blue) - Ultra FPS (>240<=300)
- Purple - Highest Ultra FPS (>300)
