The Olympus Lens Buddy app allows you to browse the full range of Olympus Micro Four Thirds and Four Thirds lenses. It allows you to browse all the lens manufacturers based on the lens mount.
 This app retails for $0.99/£0.69 and you can download it here. The full list of lens manufacturers and mounts includes: 
✔ Olympus Micro Four Thirds
 ✔ Panasonic Micro Four Thirds 
✔ Voigtländer Micro Four Thirds 
✔ Samyang Micro Four Thirds 
✔ Noktor Micro Four Thirds 
✔ Olympus Four Thirds 
✔ Panasonic Four Thirds
 ✔ Samyang Four Thirds
 ✔ Sigma Four Thirds

 This app allows you to add lenses to a Favorites page so you can…