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What's new in Rachio 4.21.15
Check out what's in the most recent app release:
• Bug fixes and performance enhancements.
About Rachio 4.21.15
The Rachio Smart Sprinkler Controller changes the way you water. It makes running your sprinklers easy and convenient while saving you water and money. Rachio automatically creates a watering schedule that lowers your water bill and ensures the beautiful yard you want, while the mobile app gives you access to your sprinkler system from anywhere. Plus, Rachio is compatible with nearly any sized yard and smart home platform.
This is the companion app to the industry leading Rachio Smart Sprinkler Controller.
Download Rachio 4.21.15
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
Version:4.21.21
Uploaded:May 27, 2026 at 4:45PM UTC
File size:76.56 MB
Downloads:0
Version:4.21.20
Uploaded:May 7, 2026 at 3:49PM UTC
File size:78.04 MB
Downloads:3
Version:4.21.19
Uploaded:April 30, 2026 at 7:38PM UTC
File size:78.05 MB
Downloads:2
Version:4.21.18
Uploaded:April 14, 2026 at 3:40PM UTC
File size:78.05 MB
Downloads:2
Version:4.21.17
Uploaded:April 13, 2026 at 5:13PM UTC
File size:78.05 MB
Downloads:1
Version:4.21.16
Uploaded:March 5, 2026 at 4:43PM UTC
File size:77.73 MB
Downloads:3
Version:4.21.15
Uploaded:March 3, 2026 at 8:06PM UTC
File size:77.74 MB
Downloads:1
Version:4.21.14
Uploaded:January 14, 2026 at 5:31PM UTC
File size:73.08 MB
Downloads:2
Version:4.21.13
Uploaded:November 24, 2025 at 4:44PM UTC
File size:72.94 MB
Downloads:8
Version:4.21.12
Uploaded:November 10, 2025 at 11:50PM UTC
File size:72.94 MB
Downloads:3
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