10. Venmo

Venmo
App Store

Venmo, an app for quickly sending and receiving money, grew 441% since June 2015.

9. Musical.ly

Musically
Musical.ly

Musical.ly, a video-based social-media platform, grew 630% from August 2015 to June 2016.

8. Lyft

Lyft app
Lyft

The ride-hailing app Lyft grew 282% since June 2015. 

7. OfferUp

OfferUp
OfferUp

OfferUp, an app for buying and selling your stuff, grew 166% since June 2015. 

6. Bitmoji

Bitmoji Promo Library Android
Bitmoji

Bitmoji, a Snap-owned app for creating personalized cartoon avatars, grew 2,078% since June 2015. 

5. Letgo

Letgo app
Letgo

Letgo, an app for buying and selling your stuff, grew 1,224% since June 2015. 

4. Wish

Wish app
Wish

Wish, a shopping app that gives you discounts, grew 171% since June 2015. 

3. Uber

New uber app
Uber

The ride-hailing app grew 99% since June 2015. 

2. WhatsApp

whatsapp
iTunes

The messaging app WhatsApp grew 91% since June 2015. 

1. Waze

Waze
Aaron Brown/Tech Insider

Waze, a Google-owned navigation app, grew 127% since June 2015.