Compatible with iPhone 8 or newer (including iPhone 12!), new iPhone SE, and modern iPads. (Full compatibility list at bottom.)


Are you ready to take that first step on your fitness journey? Fitness Ally introduces Allie, your Full Feedback AI Trainer. Get the personal trainer experience at home, with no equipment required.

Fitness Ally has no pre-recorded videos or classes you have to call in to: Allie is right there on your device, using your camera to analyze your movement and reminding you to keep your knees up, straighten your back, or a thousand different ways to help you perform at your best She’s no Negative Nancy: all feedback is positive, encouraging, and funny! (We think so anyway…)

Our workout plans are tailored just for you based on goals you set for yourself—like weight loss or strength training. Want to do something different? No problem! You can customize every aspect of your workouts, from body focus, to length of time—you can even disable certain exercises if you’re injured (or just because you hate doing them!)

◆ No canned videos or classes with thousands of strangers: Allie is right there for your every step, skip, hop, and jumping jack!
◆ Live Form Feedback, Motivation, & Rep Counts with thousands of voicelines so you'll never hear the same thing twice!
◆ Control Workouts With Your Voice
◆ Personalized Goals Set For Your Fitness Level
◆ Reminders and Notifications Keep You Sweatin’
◆ Measure Your Progress with Detailed Stats

Your Privacy Matters to Us - Fitness Ally uses your front-facing camera to provide feedback during your workout and log your performance, and you can turn on your microphone to give voice commands. Fitness Ally does not record, share, or store any video or audio—everything stays private and on your device.

We’d love it if you got in touch! To share your feedback or any issues you can reach us at and we’ll respond to you as soon as possible.

Full compatibility list: iPhone 8, 8 Plus, X, XR, XS, XS Max, 11, 11 Pro, 11 Pro Max, iPhone 12, 12 Pro, 12 Pro Max, new SE, iPad Pro 12.9” 3rd Gen and newer, all iPad Pro 11”, iPad Air 3rd Gen and newer, iPad Mini 5th Gen, & iPad 6th Gen and newer.

Terms of service:

What’s New

Version 2.2

NEW FRIENDS FEATURE! Follow your friends to keep up with their progress, compare your scores, and encourage each other--or let out that competitive spirit!

Ratings and Reviews

4.7 out of 5
61 Ratings

61 Ratings

Ringelina ,

My favorite workout app!

I’ve never had an app be as active with me as Ally has. She corrects your form, gives you tips, and has cute catchphrases and words of encouragement!
Using her everyday is part of my new schedule, and I love it. I have more energy, and my body feels fantastic!

Developer Response ,

Woohoo! So glad to hear you're seeing results, Ringelina 💪 Keep on moving with Allie, and feel free to reach out if you have any questions or just want to say hi!

MaerayTx ,


Extremely prompt, helpful customer service! First week of enjoying workouts-love it!

Developer Response ,

Thanks so much for your feedback, MaerayTX. We're so happy to hear that you're enjoying Fitness Ally! We're always here to help if you have any questions or just want to say 👋

Xzknivesx ,

About this app

I love Fitness Ally its a good stable fitness program that helps me workout.

Developer Response ,

We're so glad to hear that Fitness Ally is working for you 💪 Enjoy!

App Privacy

The developer, Twenty Billion Neurons GmbH, 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:

  • Contact Info
  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Contact Info
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


Twenty Billion Neurons GmbH
707.2 MB

Requires iOS 13.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. Subscription $29.99
  2. Subscription $9.99
  3. Subscription $4.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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