Comparison

Pilates by Kerstin vs TF STUDIO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Pilates by Kerstin

This app offers a mindful approach to fitness with low-impact Pilates workouts designed for longevity. It focuses on building strength, creating leaner muscles, and fostering a healthy relationship with exercise, food, and your body. Access guided routines, healthy recipes, and restorative practices for a holistic wellness journey.

Highlights
  • Low-impact Pilates workouts
  • 30-Day Signature Program
  • Healthy recipes for mindful eating
  • Yoga and stretch routines
  • Calming sound bowl meditations
  • At-home fitness
Features
Read full description

A Calm, Mindful Approach To Pilates & A Healthy Lifestyle The Pilates By Kerstin method is designed for longevity, meaning it will teach you how to have a fitness routine that lasts a lifetime and makes you love working out. This program will transform your body with low-impact workouts you look forward to, and create a healthy relationship with exercise, food, and your body. With Kerstin’s method, you will be stronger within 4 weeks, will have longer leaner muscles within 8 weeks, and see an overall change in your body within 12 weeks.  The workouts - Pilates by Kerstin workouts combine the classical style of pilates with Kerstin’s own signature movements, designed to give you a well-rounded workout every time. Her low-impact, at-home workouts incorporate intentional & controlled movements for a strong, toned, and sculpted body. Start with her 30-Day Signature Program and begin to develop a balanced movement routine that can last you a lifetime.  Nutrition - Kerstin believes in creating a healthy relationship with food and your body. Pilates By Kerstin offers healthy recipes that encourage mindful, intuitive eating. You will not feel deprived or restricted from your favorite foods, but will have healthy options to choose from that are easy to make at home, and will seamlessly blend into your routine.  Stretch + Restore - Pilates By Kerstin includes yoga routines, stretch videos, and calming sound bowl meditations to enjoy pre/post workout or on your days off. To access all features and content you can subscribe to Pilates by Kerstin on a monthly or yearly basis with an auto-renewing subscription right inside the app.* Pricing can vary by region and will be confirmed before purchase in the app. In app subscriptions will automatically renew at the end of their cycle. * All payments will be paid through your iTunes Account and may be managed under Account Settings after the initial payment. Subscription payments will automatically renew unless deactivated at least 24-hours before the end of the current cycle. Your account will be charged for renewal at least 24-hours prior to the end of the current cycle. Any unused portion of your free trial will be forfeited upon payment. Cancellations are incurred by disabling auto-renewal. Terms of Service: https://pilatesbykerstin.vhx.tv/tos Privacy Policy: https://pilatesbykerstin.vhx.tv/privacy

About

TF STUDIO

This app offers dynamic Pilates workouts designed for at-home use, focusing on sculpting and strengthening without bulk. It features a blend of classic Pilates with strength-based sequences, suitable for all levels and available live, on-demand, or as reformer classes.

Highlights
  • Dynamic Power Pilates method
  • Strength-based, flowing sequences
  • Live, on-demand, and reformer classes
  • Beginner to advanced workouts
  • Smart filters for class selection
  • Pregnancy-friendly and cycle-syncing options
Features
Read full description

Your at-home Pilates app for long, lean results. Access Power Pilates workouts that sculpt and strengthen, without the bulk. Start your 7-day free trial today. T — F Studio’s dynamic Power Pilates method blends classic Pilates with strength-based, flowing sequences using light weights, bands, and reformer-inspired moves. The result is a high-intensity, low-impact workout that tones, lengthens, and sculpts while reducing cortisol and stress. This is the Pilates app for LIVE, ON-DEMAND & REFORMER classes, anytime, anywhere. Created by Tasha Franken, Pilates expert & certified nutritionist, T — F Studio offers: • New classes weekly and reformer classes biweekly • Beginner to advanced workouts • Strength, cardio, pregnancy-friendly, cycle-syncing, and meditation classes • Smart filters for duration, body part, equipment, or intensity Whether you have 10 minutes or an hour, find online Pilates classes on demand designed to fit your life, body, and goals. Terms of Service: https://www.tashafranken.tv/tos Privacy Policy: https://www.tashafranken.tv/privacy

Screenshots

Pilates by Kerstin4 screens
TF STUDIO4 screens

Verdict

The call

The clearest difference is monetization model: TF STUDIO at free with in-app purchases against Pilates by Kerstin's subscription. TF STUDIO also leads on ratings volume (337 vs 86). On price, rating, review sentiment and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Pilates by Kerstin sells 2 in-app purchases, starting at $14.99 per month and TF STUDIO sells 7 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Pilates by Kerstin against 4.9 for TF STUDIO. Both are backed by a comparable volume of ratings — 86 and 337 respectively. Written reviews are what separate them: 99% of Pilates by Kerstin's written reviews are positive against 97% of TF STUDIO's.

UpkeepUpdate frequency

Pilates by Kerstin ships an update every 3 months, TF STUDIO every 2 months. Both last shipped on November 3, 2026.

Scorecard2 real differences · 8 level
Pilates by Kerstin versus TF STUDIO: the parameters behind the verdict, then further details
ParameterPilates by KerstinTF STUDIO
PriceFreeFree
Rating4.9 (86 ratings) — better4.9 (337 ratings)
Positive reviews98.8% of reviews — better97.4% of reviews
Number of ratings86337 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, Apple TV — better
Requires iOS16.616.6
Further details — not scored
Size106 MB81 MB
Age rating4+4+
DeveloperPilates By KerstinFranken Worldwide Inc.

Customer experience

Pilates by Kerstin

All ratings85 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews81 reviews
Positive98.8%
Neutral0.0%
Negative1.2%

TF STUDIO

All ratings332 ratings
Positive98.2%
Neutral0.3%
Negative1.5%
Written reviews232 reviews
Positive97.4%
Neutral0.4%
Negative2.2%

User reviews

Pilates by Kerstin

From 86 App Store ratings

What we love

  • 🧘 Calming instructor with soothing voice
  • 💪 Effective workouts with visible results
  • 📱 User-friendly app interface and navigation
  • ⏱️ Flexible workout lengths for busy schedules
  • 🎯 Multiple difficulty levels (beginner to advanced)

Room to improve

  • 📊 Limited new content updates
  • 🔄 Repetitive workouts after extended use
  • 💳 Billing and refund issues
  • ⚠️ Inconsistent rep counts and pacing between sets
  • 📝 Lack of workout descriptions/tags for filtering

TF STUDIO

From 337 App Store ratings

What we love

  • 💪 Effective and challenging workouts
  • 🧘‍♀️ Calming and grounding instruction
  • 🔥 Visible body transformation results
  • 🤩 Enjoyable and motivating
  • 🧠 Holistic approach to health and wellness

Room to improve

  • 🐛 Occasional app glitches or video playback issues
  • 🔍 Difficulty finding specific workouts
  • 🕰️ Wish for more live/interactive classes

Bugs and requests

Pilates by Kerstin

Reported bugs

3 issues
  • Wrongful charges after cancellation
  • Unresponsive customer support for billing disputes
  • One-star reviews being suppressed/not posted

Requested features

5 requests
  • More frequent new workout uploads (weekly or bi-weekly)
  • Workout descriptions and tags for filtering by modifications (knee-friendly, etc.)
  • Custom folder organization for saved workouts
  • More detailed form and breathing cues during workouts
  • Easier variations shown during exercises

TF STUDIO

Reported bugs

2 issues
  • Some videos not playing properly
  • Occasional app crashes

Requested features

3 requests
  • Custom playlists or favorites feature
  • Improved video progress tracking
  • More streaming options for TV integration

In-app purchases

2 purchases

Pilates by Kerstin

Subscriptions2
  • Pilates by Kerstin Monthly7 Days trial$14.991 Month
  • Pilates by Kerstin Yearly7 Days trial$144.991 Year
7 purchases

TF STUDIO

Subscriptions2
  • TF STUDIO Monthly7 Days trial$19.991 Month
  • TF STUDIO Yearly7 Days trial$179.991 Year
One-time5
  • T - F Studio - 999$9.99
  • T - F Studio - 1499$14.99
  • T - F Studio - 2099$20.99
Show 2 more
  • T - F Studio - 2999$29.99
  • T - F Studio - 19999$199.99

Questions

Is Pilates by Kerstin free?
Pilates by Kerstin is free to download, with in-app purchases available.
Is TF STUDIO free?
TF STUDIO is free to download, with in-app purchases available.
Which has better reviews, Pilates by Kerstin or TF STUDIO?
Pilates by Kerstin is rated higher. Pilates by Kerstin averages 4.9 out of 5 from 86 ratings, while TF STUDIO averages 4.9 from 337 ratings.
Do Pilates by Kerstin or TF STUDIO have ads?
Neither Pilates by Kerstin nor TF STUDIO shows ads.
Which is updated more often, Pilates by Kerstin or TF STUDIO?
Pilates by Kerstin ships an update every 3 months, and TF STUDIO every 2 months. Most recently, Pilates by Kerstin was updated on November 3, 2026 and TF STUDIO on November 3, 2026.

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