Keeping track of your growing connections

[Alex Wong]

I am a budding real estate investor with a growing list of connections. Since real estate is such a people business, I want to make sure I keep track of the people I connect in the past and make sure I check in with them periodically. I am wondering if anyone uses an app that would organize my contacts based on last contact date. From that, I can set automatic reminders for me to get in touch with that person within 1 month, 2 months. I know Podio is highly taunted but I don’t think I need such a robust platform since I don't wholesale. 

By organizing it this way I can avoid contacting only a few people over and over. 

Thoughts, suggestions?