> ## Documentation Index
> Fetch the complete documentation index at: https://docs.allyy.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Data health

> Is the file healthy, and can I trust the data behind these numbers?

Before reading anything into the analytics, this theme answers two questions: **is your supporter file healthy and growing**, and **is the underlying data complete and trustworthy**.

## Overview

The headline health check on your file — whether your active base and income are holding up, growing, or slipping, and how this year compares to last.

**KPIs**

* **Donors still giving** — count of donors with a gift in the active window.
* **Donors gained or lost vs. last year** — net change in active donors against the same point last year.
* **Income gained or lost vs. last year** — net change in income against last year.
* **Active donor tiers** (when tier data is present) — counts for Standard / Middle / Major / Regular givers.

**Charts**

* **Active donors — monthly with 12-month rolling average** — bars are monthly active donors; the line smooths seasonality to show the underlying trend.
* **Monthly income with 12-month rolling average** — the same treatment for income.

**Tables**

* **Donor segments** — Total / Active / Inactive / Monthly (subscription) / Sporadic, with donor counts and average donation.
* **Year-on-year comparison** — period, active donors, total income, and YoY % change.

**Controls** — a date-range slider narrows the months shown (rolling averages are computed on the full series first, so they stay correct at the edges).

<Note icon="camera">**Screenshot to add** — Overview: KPI row + active-donor tiers, and the monthly trend charts.</Note>

## Data coverage

A transparency view, primarily for you and your Allyy account manager, confirming the data landed correctly.

**KPIs (per selected table)** — Type, Rows, Date range, and Span (days).

**Charts**

* **Null rate** per column — missing-value rate, to spot gaps.
* **Records per month** — volume over time.
* **Response outcomes per month** — how responses break down (for response-type tables).

**Tables**

* **Summary** — per source: rows, date min/max, span, positive/response rate, total amount.
* **Entity breakdown** — the top entities in the table.

**Controls** — select which table to drill into, and a date-range slider for the monthly charts.

<Tip>
  If a dashboard looks off, check here first — a short date span or a high null rate on a key field usually explains it.
</Tip>

<Note icon="camera">**Screenshot to add** — Data coverage: the per-source summary table and a per-table drill-down (KPIs + monthly volume).</Note>