Separate mobile apps for business and customers or a single app with different logins?

I am building a mobile platform to connect shopkeepers and customers.The shopkeepers can post deals, showcase their products etc while customers can check out what near by stores have to offer.

I am a bit confused whether to have 2 different apps - one for shop keepers and one for customers. Or shall I have a single app that has a designated logins for shopkeepers and customers.

After thinking over it for a couple of days, below is what I have been able to figure out (multiple v/s single comparison):

single will have more updates per app than multiple app. This will be a turn off for the users. "Win-Multiple"
single will definitely be more difficult to build and maintain. "Win-Multiple"
from a features perspective, overlap b/w customers and shopkeepers won't be more than 20%."WIn - Mulitple"

Can any one please suggest me what points shall I keep in mind the most while taking the call.

Solution

Since the feature overlap is so low, you should really consider to make 2 different apps.

Pros:
- Better maintainability
- Smaller download sizes
- More user-friendly
- Pricing (if any) can be different
- What if a shop keeper is also a customer ?

Cons:
- None