a boutique fitness membership app
Estimated monthly cost at the usage scale below — billed by actual usage
43 req/s
Peak Concurrency
432.88 MB
Database Storage
1.39 GB
Object Storage
1.28 GB
Outbound data transfer
What is this app
This membership app serves members, coaches, and owners across a small chain of three boutique fitness studios. Members can buy class packs or monthly passes online, book group classes, and check in with a QR code. Coaches can view their schedules, write member training feedback, and upload short demonstration videos, while the owner can review revenue and attendance rates in an administrative dashboard.
As a member, I want to view available group classes so that I can choose a suitable session.
As an owner, I want to create and update group-class schedules so that members and coaches have current class information.
As an anonymous visitor, I want to browse public class information so that I can evaluate the studios before registering.
As a member, I want to see my current class-pack or monthly-pass status so that I know whether I can book.
As a member, I want to buy a class pack or monthly pass online so that I can access studio classes.
As a member, I want to book a group class so that I can reserve a place.
As a member, I want to check in using a QR code so that my attendance is recorded.
As a coach, I want to view my own class schedule and roster so that I can prepare for sessions.
As a coach, I want to write training feedback for members so that their progress is documented.
As a coach, I want to upload short demonstration videos so that members and coaches can review exercise examples.
As an owner, I want to view revenue and attendance rates so that I can monitor the three studios.
8000
members
Registered fitness-studio members who purchase access, book classes, check in by QR code, and view their membership status.
30
coaches
Coaches who view their schedules, review class attendance, write member training feedback, and upload short demonstration videos.
3
owners
The owner or authorized studio managers who maintain class schedules and review revenue and attendance reports.
0
anonymous_visitors
Unregistered visitors who may browse public class information but cannot purchase, book, or check in until they become members.
Requirements to minimum viable plan to cost
Momen doesn't give a vague quote: it first sizes the project's actual demand for each capability and resource, then costs each item out.
The numbers in the "Project demand" column below — their scale assumptions and derivations — are detailed in Scale & sizing.
Minimum viable plan
PRO
Online class packs and monthly passes require payment features.
See the capability-by-capability assessment ▾
PROJECT DEMAND
ALLOWANCE PROVIDED (COMPOSITION)
PRO
Pro is the minimum viable plan
Pro
(Plan tier: PRO)
See minimum viable plan above
99
single-tenant kit
43 req/s
single-tenant kit × 1
(plan/kit 175 req/s)
Covered by plan/kit (margin ~307%)
120
Database storage add-on
1.93 GB
not purchased
(plan/kit 3.00 GB)
Covered by plan/kit (margin ~56%)
0
Object storage
add-on
1.49 GB
not purchased
(plan/kit 60.00 GB)
Covered by plan/kit (margin ~3914%)
0
Outbound data transfer add-on
1.37 GB/mo
not purchased
(plan/kit 60.00 GB/mo)
Covered by plan/kit (margin ~4279%)
0
AI points add-on
0 points
not purchased
(plan/kit 5.0M points)
No requirement
0
plan + add-ons · usage-based · no development cost
Your options for this project
In the table below, the "monthly infrastructure" for the self-built / AI routes is derived from the AWS list prices shown below, sized against this project's actual usage.
2 × t4g.large × 730h
EC2 t4g.large → 98.11
2 × db.m6g.large (Multi-AZ) × 730h
RDS PostgreSQL db.m6g.large → 232.14
0.45 GB-month
RDS gp3 storage → 0.05
1.49 GB-month
S3 Standard → 0.03
0.00 GB (first 100GB free)
Internet egress → 0
Total ≈ $330.34 / mo
Pure cloud resources
DEVELOPMENT COST
MONTHLY CLOUD INFRA ($/MO)
MONTHLY TOTAL
(INFRA + OPS)
Traditional outsourcing / build in-house
about $140,000 - $240,000
≈ $330
Based on the AWS estimate above
≈ $2,330
Infra $330 + ops ~$2,000
4-7 months
5 / 5
Vibe Coding
about $45,000 - $85,000
≈ $330
Based on the AWS estimate above
≈ $1,830
Infra $330 + ops ~$1,500
6-12 weeks
3 / 5
AI full-stack generation
about $75,000 - $135,000
≈ $330
Based on the AWS estimate above
≈ $1,830
Infra $330 + ops ~$1,500
2-4 months
4 / 5
Off-the-shelf SaaS / vertical solution
about $12,000 - $30,000
N/A
Priced per seat, not by cloud infra
≈ $16,000+
Per-seat pricing, tens of thousands of users
2-6 weeks
2 / 5
Momen
Recommended
$0
$219
All-in: egress / storage / auto-scaling included
$219
1-3 weeks
4 / 5
Servers, databases, traffic and storage are inherent infrastructure costs for this project — you pay them whether you outsource, use Cursor or Lovable, or build it yourself (self-built runs ≈ $441/mo at AWS list prices, often more), plus the extra dev and ops staff. Momen bundles all of it into $368/mo all-in and removes the need for an ops team.
The frontend can be generated with AI tools (Cursor, Lovable, etc.); the hard part is the backend — auth, database, scaling, data security and ops. Momen delivers a production-grade backend as a BaaS: keep the vibe-coding speed on the frontend, while the backend runs on proven infrastructure — reliable, with no self-hosting or ops.
What scale this estimate assumes, and how the numbers are derived
Cost depends heavily on usage volume. First see the key assumptions and business scenarios this estimate uses, then the full calculation derived from each scenario for every resource — all adjustable to your real situation.
We assume the stated roughly 8,000 registered members are the dominant account population, with a small operating group of coaches and owners, plus a modest pool of anonymous visitors who may browse public class information. If the 8,000 figure already includes staff accounts or if public browsing is disabled, this overall reference population can be adjusted.
We assume this is a standard linear-growth membership SaaS product because the three-studio operation is expected to build its member, booking, attendance, and media history progressively rather than launch with a full pre-existing dataset. If the app imports a complete year of historical purchases, bookings, and attendance at launch, this parameter can be adjusted upward.
Class Check-in Peak
Routine Member Booking
Routine Member Booking
Coach Daily Operations
30
times/month
42.93 req/s
Peak load
We assume several classes create a repeated arrival burst shortly before their scheduled start, making check-in materially more synchronized than ordinary browsing. The two-minute window reflects scanning and confirmation at the studio entrance. The scene recurs on most operating days, represented by thirty monthly occurrences for a typical daily schedule. Only the check-in purpose is included so routine browsing and management work do not inflate this peak.
Main impact: Peak Concurrency
The scenarios above set the assumptions for each resource; below is the full calculation based on those assumptions. Click to expand each item.
How this app works
What exactly does this budget support? Broken down by business scenario, showing the pages, data tables, automation flows and AI
assistant behind each one.
Member browses upcoming classes and reserves a place.
Member selects and purchases a membership product.
Member checks into a booked class by QR code.
Coach reviews a class, records member feedback, and manages demonstration videos.
Owner maintains the class schedule and assigns coaches.
Owner reviews revenue and attendance rates across studios.
Anonymous visitor browses public class availability information.
page
data_table
action_flow
Member Home Page
Entry page for browsing upcoming classes and checking a member's current access.
Membership Purchase Page
Plan selection and online purchase confirmation page for members.
Class Booking Page
Class detail and reservation page for members.
QR Check-in Page
QR-based attendance check-in page for booked members.
Coach Schedule Page
Coach-facing schedule, roster, feedback, and demonstration-video workspace.
Owner Dashboard Page
Owner dashboard for revenue and attendance-rate reporting.
Studio Class Management Page
Owner and studio-manager workspace for creating and maintaining the class schedule.
What you might want to know about this project
The Q&A below is generated by AI based on this project's type, features and scale.
What most affects the system's resource usage?
Is this a simple membership app or a more complex system?
How do coach-uploaded videos affect the plan?
How does supporting three studios affect the design?
How are revenue and attendance reports produced?
Copy to discuss with AI
Challenge & re-estimate