Kinlet Kinlet Failed payment calculator

What do failed payments cost your community in a year?

Four numbers. The math runs on this page – nothing you type here is stored or sent anywhere.

Members on a paid plan right now. Free members don't count.
What one member pays per month. For yearly plans, divide the yearly price by 12.
Members whose payment failed and never went through, so their subscription ended. The default is an average across subscription businesses1, not Whop data. For your own number: in Whop, Dashboard → Payments → Status → Past due lists the payments that are failing right now.
There is no default here: we found no reliable average for paid communities. A quick way to estimate yours: 1 ÷ your monthly churn. At 5% churn, a member stays about 20 months.

Enter your numbers to see the estimate.

Kinlet shows you these members while there is still time to remind them.

When a renewal fails, Whop retries the charge for five days and, depending on your settings, emails the member and cancels the membership. Kinlet is an app for Whop community owners that shows you which paying members have a failed payment, how much monthly income is at risk, and who to write to before those five days run out. Reminders reach only members who still have access to your whop, so turn on Keep access while past due (Settings → Checkout). Nothing reaches your members until you press send – unless you switch on automatic payment reminders.

Failed payments are one of the signals Kinlet watches. The others are cancellations, ending trials and members who still pay but have gone quiet. Kinlet never charges, refunds or changes a payment, and never offers your members discounts.

If Kinlet can't see something, it tells you on the screen instead of going quiet. A flat monthly price by paying members, never a share of your revenue.

This is what Kinlet shows you every day

Kinlet's daily list: members at risk, the reason for each, and the monthly revenue at risk. Sample data.
Sample data. No real members.

What Kinlet sends to a member whose payment failed

Word for word. You can read the same texts in the app before anything is sent.

What it costs to try

    Install Kinlet free on Whop

    Kinlet is in Whop's app store review, so it won't show up in Whop's search yet. The install page is on whop.com.

    Questions owners ask

    Can Kinlet touch my money?

    No. Kinlet can see whether a payment failed. It can't charge, refund or change a membership. It never asks Whop for those permissions.

    Does Kinlet message my members without my OK?

    Automatic payment reminders: off until you switch them on. When they are on, Kinlet sends a payment reminder on its own 2 days after a payment fails, after Whop's own reminder – 3 a month on the Free plan. For the first 3 days after you install Kinlet, nothing is sent automatically. Everything else is sent only when you press send.

    What do my members receive?

    Short Whop notifications in your name. You can read every message word for word in Kinlet before anything is sent. A member gets at most 3 messages in any 120 days through Kinlet.

    Does Kinlet warn me about cards that are about to expire?

    Yes. Kinlet shows how many members on your list have a card that expires before their next renewal. Paid plans, including the free trial, show who they are. Kinlet doesn't message members about it.

    How does Kinlet count results?

    It shows how many members paid again after a reminder, and nothing more. It doesn't claim that the reminder made them pay.

    Who counts as a paying member?

    A member whose membership is active on a plan priced above zero. A free trial doesn't count, and free members never count.

    What does Kinlet cost?

    Seeing which members are at risk is free, with no time limit. Every new business gets a paid plan free for its first 30 days – no card, nothing charged. Paid plans go by how many members pay you, never a share of your revenue: Starter $29 (up to 100 paying members), Growth $79 (up to 500), Large $179 (no member limit) per 30 days. Paid plans open soon.

    What happens to my members' data?

    Kinlet doesn't store your members' names, usernames, email addresses or anything they write. The only message text it keeps is the text of the messages Kinlet itself sends, so you can see exactly what was sent. After you uninstall, member IDs are removed within 30 days.

    Where can I see what Kinlet is allowed to do?

    On Whop's install screen, before you approve. It lists every permission Kinlet asks for. None of them lets Kinlet charge, refund or change a membership.

    Are Kinlet's terms published?

    Yes. The terms, the privacy policy and the data processing agreement are public, and you can read them before you install:

    Sources and assumptions

    Read on 2 October 2026. The default is an average for subscription businesses in general. It is not Whop data.

    1. Churnkey, State of Retention 2025 – 15 million subscriptions at over a thousand companies: involuntary churn (red line) centered around 1% a month. This is the default for members lost to failed payments. It is a vendor's own data, and it mixes business and consumer subscriptions.
    2. Whop help center, Troubleshoot failed payments – Whop automatically retries the charge over a five-day period; if the payment still fails after five days, Whop cancels the subscription.
    3. Stripe, How we built it: Smart Retries – subscriptions brought back after a payment failure continue on average for seven more months.