Gym owners

Set a default admission fee

A one-time joining charge, on top of the plan fee. Set it once and it fills itself in every time you add a member.

Steps

Go to Plans in the sidebar. The Default Admission Fee (₹) box is at the top, above your list of plans.
Type the amount — for example 500.
Tap Save. A green "Default admission fee saved." appears.

From then on, whenever you add a member and pick a plan, Admission Fee in the Payment at Admission box starts with that number already in it.

It is one number for the whole gym, not per plan. Every plan gets the same joining fee.
It is only a starting value. The Admission Fee box on the Add Member form is fully editable — clear it to zero to waive the fee for someone, or type a different figure.
It only appears when you pick a plan. The Payment at Admission box does not show at all for a walk-in with no plan, so no admission fee is offered for them.
It goes into the same payment as the plan fee, not a separate one. One payment is recorded, for the Total of the two, described as "Plan Fee — plan name + Admission Fee". You will not see admission fees as their own line anywhere.
Renewals never charge it. The Renew Membership tab charges the plan price and nothing else, which is right — admission is a joining fee. If you do want to charge a returning member again, add it as an Other Payment.
Changing it does not affect anybody already added. It is only a default for the next form you open.
Clear the box and save to switch it off. New member forms then start with the admission fee empty.
The Save button here is only for the admission fee. Your plans below save separately, from their own dialogs.

You set it, but the Add Member form shows an empty Admission Fee. The default is applied at the moment you choose a plan, not when the form opens. Pick the plan and it appears. If it still doesn't, reload the page — the form reads your gym's settings when it opens.
"Failed to save. Please try again." Nothing saved and the box keeps what you typed. Tap Save again.
You typed the amount but never tapped Save. There is no automatic saving here. Leaving the page loses it.
You wanted a different joining fee per plan. Not possible — there is one figure for the gym. Either set the common one here and edit the odd cases on the form, or fold the joining fee into the plan price itself.
You want to see how much you have taken in admission fees. There is no separate total. They are inside the joining payments. Search "Admission" on Payments with the period set to All Time to list every payment that included one — though the amounts shown are the combined totals, not the fee alone.