you don't need an app just make a list of muscle groups: https://stevenlow.org/the-fundamentals-of-bodyweight-strength-training/

For beginners, a simple beginner routine will often boil down to:

Horizontal and vertical pushing exercise
Horizontal and vertical pulling exercise
Handstand, L-sit progression
Anterior and posterior chain/hip hinge leg exercises

Thus, it would normally look like:

Push: Pushups progression as the Horizontal and Dips progression as the Vertical
Pull: Rows progression as the Horizontal and Pullups progression as the Vertical
Handstand balance as the overhead movement,
L-sit/V-sit/manna progression as core
Legs: Pistol progression as the anterior chain, and deep step ups or shrimp progression as hip hinge

and also: https://stevenlow.org/integrating-bodyweight-and-barbell-training/