Comparison

PROTAGONIST ZURICH vs ClassSub

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

Head to head
About

PROTAGONIST ZURICH

Features
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Two formats, one standard: precision, intensity, and progress that lasts. Reformer Sessions Tech-enabled training on Switzerland’s first Reform RX machines. Intelligent resistance, precision flows, real-time biometric feedback. Instructor-led, hybrid, or self-guided — built to push harder, move smarter, and measure every step of progress. Strength Sessions Immersive, minimal, uncompromising. Headphones on, focus locked, the work is raw and effective. With a mat, dumbbells, and kettlebells, you’ll move through dynamic full-body sequences designed to build lean muscle, endurance, and functional strength that lasts beyond the studio. The PROTAGONIST App Book and manage all sessions with ease Explore memberships and packs Get updates, drops, and community events first This isn’t fitness as usual. It’s a system. Designed for measurable progress. Built for those who don’t settle. Be the Protagonist.

About

ClassSub

Features
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When you can't teach, someone you trust can. ClassSub is a sub-coverage app built for fitness instructors. It works for yoga, pilates, barre, group fitness, dance, and anything class-based. Post a sub request once. The trusted instructors in your group see it instantly. The first qualified person claims it. No public marketplace, no random instructors, no group-chat scramble at midnight. WHY CLASSSUB IS DIFFERENT • Trusted circle, not a marketplace Your sub requests only go to people you've explicitly added to your group. You build the circle once. The trust compounds. • Structured class handoff Door code, music, mat orientation, regulars with special needs, expected attendance, level. Every field built from real instructor research. Your sub walks in already knowing the room. • Anti-poaching by design Subbing your class isn't an audition. After every cover, the substitute gets a one-tap reminder. Subbing stays subbing. • Auto-calendar sync Claim a class. It lands in your system Calendar with reminders at 24h, 4h, 1h, and 30 minutes before. Even 20-year veterans miss classes when they're not on the calendar. • SOS escalation Out of time? Hit SOS. Every eligible instructor gets a priority alert immediately, bypassing head-start windows. • Pass silently Not your class this time? Pass without notifying the poster. No social weight. Reversible. WHO IT'S FOR • Yoga, pilates, and barre instructors juggling 2 to 5 studios • Group fitness teachers who cover for each other on weekly rotations • Studio owners who want their team to coordinate coverage without DMing them constantly • Career substitutes building a roster across multiple studios WHO IT'S NOT FOR • Anyone looking for a public sub marketplace. ClassSub is closed circles only. • K-12 substitute teaching. • Solo gym workouts. This is for class-format coverage. PRIVACY Your data lives in your trusted groups. We don't run ads, don't sell data, and don't share your activity with anyone outside the groups you're in. Full privacy policy: classsub.inpulsd.com/privacy QUESTIONS? hello@inpulsd.com

Screenshots

PROTAGONIST ZURICH3 screens
ClassSub4 screens

Verdict

The call

The clearest difference is update cadence: ClassSub at daily against PROTAGONIST ZURICH's every 4 months. PROTAGONIST ZURICH's advantage is iOS requirement (15.1 vs 17.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PROTAGONIST ZURICH ships an update every 4 months, ClassSub daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 4 level
PROTAGONIST ZURICH versus ClassSub: the parameters behind the verdict, then further details
ParameterPROTAGONIST ZURICHClassSub
PriceFreeFree
Update frequencyEvery 4 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size86 MB8 MB
Age rating4+4+
DeveloperSpotbee, Inc.Inpulsd

In-app purchases

None

PROTAGONIST ZURICH

No in-app purchases

None

ClassSub

No in-app purchases

Questions

Is PROTAGONIST ZURICH free?
PROTAGONIST ZURICH is free to download, with no in-app purchases.
Is ClassSub free?
ClassSub is free to download, with no in-app purchases.
Do PROTAGONIST ZURICH or ClassSub have ads?
Neither PROTAGONIST ZURICH nor ClassSub shows ads.
Which is updated more often, PROTAGONIST ZURICH or ClassSub?
PROTAGONIST ZURICH ships an update every 4 months, and ClassSub daily. Most recently, PROTAGONIST ZURICH was updated on October 30, 2026 and ClassSub on October 31, 2026.

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