Willow®4.4.1 - App Store

More than a pump app. A support system.

Control your pumps with a tap from your phone or your wrist, track your session history, and view your pumping trends and metrics. Scan and manage Willow SmartStash Bags in your fridge and freezer. Plus, get access to expert guidance from educational content, live services, and our specialized, AI-powered chat-a virtual support system designed to support you across pumping, feeding, and postpartum care.

Who can use the Willow app?
This app is compatible with all connected pumps, including Willow Go, Sync, 360, and 3.0. Willow Wave users can manually add manual pump sessions to their session history. And anyone wanting to manage their milk stash can keep track in our SmartStash inventory tracker. All of the pumping, feeding, maternal healthcare, parenting and baby development resources in the app are free for anyone to use!

Operate your pumps with a tap.
Start and stop your session, switch between modes (Go and Sync), adjust suction levels, and view your pumping duration, all from your phone or smart watch. Set up your own Pumping Preferences, including suction levels and custom timer settings, and set reminders so every session works just the way you like.

Get the only app that lets you control your session from your Apple Watch. NEW! You can now control your Go pumps, in addition to Willow 360 and 3.0.

Track your sessions. Understand your output.
Follow your milk output, session durations, add manual pump sessions and more for a complete picture of your pumping history. Spot trends, optimize your routine, and pump with confidence. With SmartStash, you can quickly and easily scan Willow Milk Bags into your digital stash to manage your inventory in the app.

Get your questions answered.
Access a comprehensive library of expert-backed articles and videos on all things pumping, feeding, and postpartum care, from establishing supply and building schedules to combo-feeding and more. The Willow app also includes our conversational AI, specially dedicated to women’s health, designed by moms for moms. With both expert resources and AI-powered support, you always have trusted guidance at your fingertips.

Book expert sessions for personalized guidance.
Connect with lactation consultants, pelvic floor therapists, mental health professionals, Willow sizing experts, and more. Because we know it takes a village.

Visit onewillow.com to learn more about the app and explore accessories, content, and more.

Version History Bug fixes and minor enhancements. 4.4.1 Sep 16 Watch support, expanded and reimagined.
The latest version of the Willow app now includes Apple Watch support for Willow Go pumps, in addition to a new, streamlined and easier-to-use interface for 360 and 3.0 pumpers! 4.4.0 Sep 10 Bug fixes and minor enhancements 4.3.6 Jun 30 Bug fixes and minor enhancements 4.3.4 Apr 20 Bug fixes and minor enhancements 4.3.3 Apr 13 Introducing SmartStash in the Willow app. Quickly and easily scan Willow Milk Bags into your digital stash. Manage your inventory of stored milk in your fridge, freezer and deep freezer. 4.3.2 Mar 11 Bug fixes and minor enhancements 4.3.1 Feb 17 Bug fixes and minor enhancements 4.3.0 Jan 21 Fixes for intermittent issues with duration timers on Go pumps 4.2.2 12/15/2025 Added manual session entry for all pump types
Introduced tracking and data visualization support for Willow Wave pump sessions 4.2.1 12/08/2025 We've re-vamped our session history tab to give greater insights and enhanced views of your pumping journey.
Assorted bug fixes and improvements. 4.2 11/18/2025 Added support for Willow Sync.
Assorted bug fixes and improvements. 4.1.10 10/08/2025 Bug fixes 4.1.9 09/24/2025 Bug fixes and minor UI enhancements 4.1.8 06/17/2025 We've adjusted the battery status displays for Go users so it will no give the false impression that it is only 75% full as soon as you start using it. We also fixed an issue where reminder timers could no longer be paused. 4.1.7 03/24/2025 Our pump timers now have an updated interface to be more user-friendly. We have also made various interface improvements and bug fixes. 4.1.6 02/24/2025 Custom pump timers are now here! You can find them within the pump preferences page. 4.1.4 01/14/2025 We're happy to introduce pumping preferences to further customize your pumping experiences. With this update, you can now save your preferred initial suction levels as well as setting pumping reminders. You can find the pumping preferences directly on the Pump tab next to the Help icon. 4.1.3 12/11/2024 Introducing Ema, the first conversational AI tool specializing in women’s health, available now in the Learn and Service tabs in the Willow app. Clinically validated and trained by experts, Ema can answer questions on topics ranging from plugged ducts to periods to perimenopause. Ema is your personal pumping, feeding, and postpartum support system. 4.1.2 11/12/2024 Fixing issues with resetting your account password and requesting account deletion 4.1.1 10/30/2024 Fixed an issue occurring during the creation of new user accounts 4.1.0 10/24/2024 We have added support for updating the firmware of your Gen 3 and 360 pumps into the app as well as stability enhancements. 4.0.12 10/24/2024 Bug fixes and optimizations. 4.0.11 09/23/2024 For those moms with older versions of Go pump firmware, you can now update the firmware on your Go pumps through the app. 4.0.10 08/19/2024 We've made further improvements to our Bluetooth system to address connectivity issues for some users 4.0.9 08/06/2024