Muscle & Flow vs Backyard Boston
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Muscle & Flow
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For members of Muscle and Flow to reserve their place in a class, sign up for gym events, and general account management like updating headshots and credit card on file.
Backyard Boston
This app connects users with a fitness community and instructors in Boston. It allows you to book classes, monitor your fitness journey, and engage with fellow members. The platform emphasizes a supportive environment where hard work and presence are valued.
- Book fitness classes
- Track fitness progress
- Connect with community
- Fitness instructor-created
- Boston-based community focus
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Welcome to the New Backyard Boston in Fort Point! Backyard was created by three Boston fitness instructors that strive to create a place where everyone feels seen and that serves as a second home to all. A place where GRIT meets PLAY and hard work is understood rather than repeatedly requested. A place where being there serves a greater purpose and that purpose is understood and supported by everyone else. Backyard is deeply entrenched in the Boston community and is dedicated to giving back to the very city that it serves. With the Backyard Boston app, you are able to book your classes, track your progress and connect with your community!
Screenshots
Verdict
The clearest difference is update cadence: Muscle & Flow at monthly against Backyard Boston's every 10 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.
Muscle & Flow ships an update monthly, Backyard Boston every 10 months. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.
| Parameter | Muscle & Flow | Backyard Boston |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Monthly — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15 — better | 16.4 |
| Further details — not scored | ||
| Size | 91 MB | 121 MB |
| Age rating | 4+ | 17+ |
| Developer | Muscle & Flow | Sutra Fitness, Inc. |
In-app purchases
Muscle & Flow
No in-app purchases
Backyard Boston
No in-app purchases
Questions
Is Muscle & Flow free?
Is Backyard Boston free?
Do Muscle & Flow or Backyard Boston have ads?
Which is updated more often, Muscle & Flow or Backyard Boston?
Other comparisons
