If your App needs 10 screens, it could be your approach to writing the App is wrong. For example, I have seen people write Quiz Apps and they have used an image and a set of questions on each screen, when for that scenario only one screen is needed.
For very sophisticated Apps, it's still difficult to hit that 10 screen limit but if it is genuinely necessary, using Virtual Screens is often the best approach. How do they work? Screen1 is the ‘real’ Screen and device-sized Vertical Arrangements on it are displayed/hidden as required - they are the Virtual screens.