Pilates Underground vs Fourth Space Studios
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pilates Underground
Read full descriptionHide full description
At Pilates Underground in Utah, we're redefining what Pilates can look and feel like: from group reformer to one-on-one Cadillac workouts that challenge, a studio that feels alive, and a community that's got your back. We're focused on helping people move better, feel stronger, and build a long-lasting foundation for health. Our space offers energizing Pilates group classes on high quality reformers trusted by studios worldwide, as well as private and duet sessions on the renowned Cadillac. We ensure that every client, from injured to beginner and advanced, has the tools and support to thrive. We also offer class packs and monthly membership options to fit your lifestyle needs. Rooted in resilience and energy. Grounded in movement and community. Pilates Underground is always rising. Rise with us — reserve and manage your sessions conveniently on the app. Easy booking, no phone calls necessary. Here’s a look at our Pilates classes: Foundations – Beginner-friendly and capped at 6 people, this class takes the intimidation out of Pilates. Learn how to set up your reformer, adjust springs, and move with proper form while building strength and confidence to take on the next level. Level 1 – Step beyond the basics with a focus on core strength, balance, and stability. A steady pace and clear instruction make this the ideal bridge from Foundations. Level 2 – More resistance, dynamic sequences, and smooth transitions. This class builds endurance, challenges control, and connects strength with fluid movement. Level 3 – Advanced sequences designed to push your limits. Expect higher resistance, complex choreography, and next-level strength and stamina. Cardio – Add intensity to your Pilates practice with the jump board. This heart-pumping class blends cardio bursts with reformer precision for a full-body sweat. Strength – Pilates meets resistance training. Using added weights and reformer work, this class sculpts muscle, builds power, and delivers a true strength workout. Not sure where to start? We’ll guide you to the right fit — just ask.
Fourth Space Studios
Browse and purchase class packs or memberships. View the schedule, filter classes by type, and book reservations. Manage upcoming classes to stay organized and committed to fitness goals.
- Purchase class packs and memberships
- Browse class schedule
- Filter classes by type
- Manage class reservations
- Track upcoming classes
Read full descriptionHide full description
Features: - Purchase Class Packs and Memberships Easily browse and purchase our class packs or membership options - View our schedule Filter classes by type to find the perfect fit for your routine. - Manage your reservations Book your class reservations with ease. Keep track of your upcoming classes and manage your schedule to stay organized and committed to your fitness goals.
Screenshots
Verdict
The clearest difference is update cadence: Fourth Space Studios at every 3 weeks against Pilates Underground's every 11 months. On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Pilates Underground ships an update every 11 months, Fourth Space Studios every 3 weeks. The most recent releases landed on October 9, 2026 and October 19, 2026 respectively.
| Parameter | Pilates Underground | Fourth Space Studios |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 11 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 121 MB | 38 MB |
| Age rating | 12+ | 4+ |
| Developer | Sutra Fitness, Inc. | Fourth Space Studios, Inc. |
In-app purchases
Pilates Underground
No in-app purchases
Fourth Space Studios
No in-app purchases
Questions
Is Pilates Underground free?
Is Fourth Space Studios free?
Do Pilates Underground or Fourth Space Studios have ads?
Which is updated more often, Pilates Underground or Fourth Space Studios?
Other comparisons















