Class Timetable and Booking Sheet for Studios

Class Timetable and Booking Sheet for Studios is an offline app (one HTML file in a zip) for a small studio that runs the same classes every week. You enter each class once with its weekday, time, length, instructor and number of seats. You then book members into a class on a date. When a class is full the next person goes on a waitlist, and a button moves them in when someone cancels. Each class has a register for attendance, and each package (a 10 class pass, for example) shows its credits used and left.

The problem it removes: Bookings live in chat messages and a notebook, a class gets one person too many, a cancelled seat is never offered to the person waiting, and nobody knows how many credits a pass has left until the member argues about it. This app keeps one booking sheet per class, counts the seats, remembers the waitlist and counts the credits.

What is inside:

• Weekly timetable grid with seats taken over seats available for every class, full classes marked and a waitlist count, switching to a day by day list on a phone
• Classes with weekday, start time, length, instructor, room, seats and optional start and end dates for a course
• Bookings for a dated class with a seat count that refuses one booking too many, a waitlist in order, and a button that moves the first person in when a seat frees
• Register for each class with Here and No show marks, a printable register sheet and a printable timetable
• Packages with credits bought, used and left, a validity date, and an optional rule that a booking needs a package
• Cancel a class on one date: everyone booked is set to Cancelled and their credits come back, with Undo
• Checks for past classes with no attendance recorded, free seats while someone waits, members booked into two classes at once, and packages that are overdrawn, expiring or expired
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: owners and front desk staff of small yoga, pilates, dance, barre, spin and fitness studios and community classes who run weekly classes with limited seats and sell class packages.

What it is NOT: It does not take online bookings, send reminders, take payments or card details, or connect to any booking website. It records what the person using it types. Prices are only a note beside a package and nothing is charged. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (155 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 525 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed; Firefox: could not be launched. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).