Thanks for your quick response.
I have checked your sample project, it just used a system font-family.
In my project I want to use a custom font with a TTF font file.
I have modified your sample project and add my custom font to SfNumericUpDown control and a label.
It shows perfectly on label control and also works fine in SfNumericUpDown control in iOS platform.
I have problem in Android platform.
Please check modified project that I have attached.
Best Regards,
Armin Rasoulian