Apartment hunting in the United States often starts with one name, and Apartments.com Rental Search, built by the CoStar Apartments.com Android Team, has become one of the most downloaded tools for that task. Available free on Google Play, with a matching version on the App Store, it has passed tens of millions of installs and holds a strong rating from renters across the country. The download costs nothing, and there is no subscription hiding behind the sign-up screen. Ads appear in the browsing feed, and certain premium tools sit behind optional in-app purchases, but the core search experience stays open to anyone with a phone.

Searching begins with a location, a price ceiling, and a few filters that narrow the map. From there, listings appear as pins or as cards with photos, floor plans, and lease terms. Tapping a property reveals contact details, walk scores, and sometimes a virtual tour. I have used the saved search option more than once during a move, and the daily alerts made the process feel less like guesswork. Scheduling a tour happens inside the app, and many listings let you message the property manager directly. The layout keeps most actions within two or three taps, which matters when you are comparing dozens of units on a small screen.

Rival platforms such as Zillow and Realtor.com cover both sales and rentals, which spreads their focus. Apartments.com Rental Search stays with rentals only, and that shows in the details: parking costs, pet policies, and application fees sit near the top of every listing. Zillow sometimes feels busier with mortgage calculators and agent profiles. Here, the design leans toward clean listing cards and fast map loading. Having tried both during separate moves, I found the rental-only approach easier to scan when time was short.

• Filtering goes deep without feeling cluttered. You can set rent range, number of beds and baths, pet rules, and move-in dates, and the map updates as you adjust them. Compared with Zillow, the filter panel is simpler and quicker to reset.
• Listing pages pack in practical detail. Photos, floor plans, and lease terms sit in one scroll, so you rarely need to open a browser to check something small.
• Saved searches and alerts work quietly in the background. New units that match your criteria show up as notifications, which saved me from refreshing the app every morning.
• Direct messaging with property managers is built in. Replies usually arrive within a day, and the thread stays tied to the listing instead of disappearing into email.

• You can compare several apartments side by side without leaving the app.
• Tour scheduling removes the back-and-forth phone calls.
• Alerts keep you current when the market moves fast.
• Listings include fees and policies up front, which reduces surprises later.

• Some listings repeat across neighborhoods, which can slow down browsing.
• Certain features, like enhanced visibility for renters, require payment.
• Coverage in smaller towns is thinner than in major cities.