Prepaid plans break everything
A 12-month prepaid membership shows as one giant payment. Your monthly trends look wrong, your cohorts are distorted, and your retention numbers lie.
FOR GYMS
The analytics your billing system should have.
Turn messy billing exports into clear retention analytics - prepaid plans, mixed memberships, and inconsistent data - all handled, directly in Google Sheets.
Raw customer data not permanently stored
Works inside your sheet
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Member Retention by Signup Month
| Cohort | M1 | M2 | M3 | M4 | M5 | M6 |
|---|---|---|---|---|---|---|
| Jan '24 | 100% | 82% | 64% | 61% | 58% | 55% |
| Feb '24 | 100% | 79% | 61% | 57% | 54% | 52% |
| Mar '24 | 100% | 76% | 59% | 55% | 52% | 50% |
| Apr '24 | 100% | 80% | 62% | 58% | 55% | |
| May '24 | 100% | 77% | 58% | 54% |
Month 3 churn cliff - where most gyms lose members
The problem
Your billing system tracks payments.
It doesn't explain your business.
You can see who paid and when. But the questions that actually matter - are members staying? is revenue growing? which plans are working? - require hours of manual spreadsheet work.
Exports are inconsistent
Every billing system exports differently. Column names change, date formats vary, and the data you need is buried in fields that were not designed for analysis.
Mixed plan types
Monthly, annual, class packs, punch cards, family plans - all in the same export. Segmenting and comparing them takes manual work every single time.
What Jetti Sheets uncovers
The patterns that keep showing up
When you run years of billing data through Jetti Sheets, patterns emerge that were not visible before. These come up again and again across membership-based businesses.
Trial length & retention
Shorter intros often drive more sign-ups but worse retention. Cohort data lets you compare trial lengths side by side and see which ones actually convert to long-term members.
Revenue up, members down
A dues increase can make revenue look healthy while membership count quietly declines. The waterfall separates price changes from real growth so you see both.
The churn cliff
Most gyms have a specific month where new members drop off - month 2, month 3, month 6. Finding yours tells you exactly when to reach out before it is too late.
The plan worth promoting
Some plan types retain far better than others but get undersold at the front desk. Segmenting reveals which memberships are worth steering new sign-ups toward.
What you get
Drop your export in. Get the full picture.
Retention reports, revenue breakdowns, member-level drill-downs, and presentation-ready charts - all from a single billing export.
1
Paste your export
Billing data into any Google Sheet
2
Confirm columns
Jetti Sheets auto-detects - one click to adjust
3
Get your reports
New tabs in your spreadsheet, ready to go
Cohort Analysis
See when members churn and which signup months retain best. Heatmap formatting makes drop-off obvious.
Revenue Waterfall
New, returning, upgrades, downgrades, and churn - separated and quantified every month.
Click-to-Drill
Click any number to see who's behind it. '15 churned' becomes 15 names you can follow up with.
Interactive Charts
Build-up, retention curves, revenue flows. Filter, compare, and export at 2x resolution.
Auto-Detect and Segment
Jetti Sheets identifies your columns and classifies plan types - monthly, trial, drop-in, punch cards - automatically.
Prepaid Normalization
Lump-sum payments auto-spread across their duration. A $1,200 annual shows as $100/month.
FAQ
Common questions
If your billing system can export member transactions as a CSV or spreadsheet - with a member name, a date, and an amount - Jetti Sheets can analyze it. We have tested with Mindbody, ABC Fitness, Zen Planner, Pike13, PushPress, and ClubReady. If yours is not listed, it almost certainly still works.
Jetti Sheets automatically detects lump-sum prepaid plans and spreads them across their duration. A $500 six-month fast pass shows as ~$83/month in your MRR - so your monthly numbers are accurate even when the billing system records it as a single transaction. Refunds are handled correctly too.
The more history, the better. Two years gives you solid retention curves. Four years lets you compare year-over-year trends and see whether changes you made - pricing, trial length, class schedules - actually moved the needle. Jetti Sheets handles large datasets. We have analyzed millions of rows.
No. If you can paste data into Google Sheets, you can use Jetti Sheets. The sidebar walks you through column mapping, auto-detects plan types, and generates reports as regular spreadsheet tabs. No formulas, no SQL, no data engineering.
Yes. Core analytics run on Google Cloud and we do not permanently store your raw member data. Results can be cached up to 24 hours for speed, then auto-delete. If you choose Ask AI summaries, aggregated report metrics are sent to Anthropic; raw member records are not sent. Read our full security page ->
Standard is $50/month. Plus is TBD. Request a Demo if you want help evaluating fit before subscribing.