Excel to App/PDF Conversion

I need an Excel service document transformed into an app or PDF version. The solution should be accessible on both tablet and desktop devices.

Essential functionalities include:
- Data input: Users can enter data.
- Data visualization: Present data in a clear, visual format.
- Insert pictures

Ideal candidates should have experience in:
- App development (native or web-based)
- PDF creation tools
- Data visualization techniques
- Cross-platform compatibility

Please provide examples of similar work done.