Sienna: Interval Timer
HIIT, Tabata & Stopwatch
Free · In‑App Purchases
Train in a warm boho look that actually keeps you going – with HIIT, Tabata, countdown & stopwatch, for iPhone and Apple Watch.
Your Rhythm. Your Focus.
Forget cold neon colors and piercing alarms. Sienna redefines the interval timer—with a warm, elegant design that invites you to stay consistent. Designed for HIIT, Tabata, or your own personal pace, whether at home or at the gym.
DESIGN THAT INSPIRES.
Sienna combines soothing, earthy tones with gentle audio cues and uplifting words to carry you through every round. Choose from five harmonious accent colors to make Sienna truly your own personal training space.
FOUR MODES. ABSOLUTE FLEXIBILITY.
No matter how you move—Sienna adapts seamlessly to your routine:
• ROUNDS – Perfect for circuit training. Move through exercises one after another, structured by precise rest intervals.
• SETS – The ultimate focus mode. Complete multiple sets of a single exercise before moving on to the next.
• COUNTDOWN – A flexible timer that adjusts perfectly to your custom intervals.
• STOPWATCH – Keep track of your own pace with ease—complete with lap and split times.
CONSISTENCY OVER INTENSITY.
Your workout isn't over when the timer stops. Use brief post-workout notes to reflect on what made you proud or what felt effortless today. Your statistics highlight your small victories and growing streaks. No pressure, no penalties—just pure motivation to turn individual sessions into a lasting rhythm.
BUILT FOR IPHONE AND APPLE WATCH.
Plan and customize your workouts effortlessly on your iPhone. Or leave it in your bag: Sienna runs completely standalone on your Apple Watch, guiding you right from your wrist while seamlessly saving your workouts to Apple Health.
Sienna is free to download and use. For absolute focus, you can remove advertisements permanently with a single, one-time purchase.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Victoria Kreszies, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Victoria Kreszies
- Size
- 14.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 2 more
- English, Dutch, German
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $3.99
- Copyright
- © 2026 Krezzi Apps
