Best apps like K21

10+ similar apps compared and reviewed

4.6 avg rating
8 free apps
Updated July 2026

K21 is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to K21

STORE ROOM Smart Self Storage#2

STORE ROOM Smart Self Storage by STORE ROOM GMBH

Strong Contender
🔧 Utilities
5.0(1 ratings)
Free
STORE ROOM Smart Self Storage screenshot 1
STORE ROOM Smart Self Storage screenshot 2
STORE ROOM Smart Self Storage screenshot 3

Rent, manage, and access storage units with ease. This app allows you to open gates, building entrances, and your personal storage unit remotely. Enjoy 24/7 access to your belongings at the largest self-storage facility in Austria.