---
title: "What a change did: for one change day (a new version, screenshots, subtitle, keyword field, a campaign…"
method: GET
path: "/apps/{appId}/change-impact"
tags: ["Growth"]
---

# What a change did: for one change day (a new version, screenshots, subtitle, keyword field, a campaign…

`GET /apps/{appId}/change-impact`

## Request

- Base URL: `https://storelift.net/v1`
- URL: `https://storelift.net/v1/apps/{appId}/change-impact`
- Auth: one of:
  - HTTP bearer
  - API key in header `x-api-key`

What a change did: for one change day (a new version, screenshots, subtitle, keyword field, a campaign start — defaults to the latest change on the listing timeline) compares the same number of days before and after, side by side: keyword ranks (up/down/entered/dropped and the biggest moves), the App Store funnel (impressions, page views, downloads per day and the conversion rates), downloads from the sales report, and subscription revenue and trial/paid starts per day, each with the change in percent. The change day itself is left out of both windows. complete=false means the after window is still running. recentChanges lists the last change days to pick another one.

## Path parameters

- `appId` string, required

## Query parameters

- `country` string
- `day` string
- `window` integer

## Response `200`

OK

- object
  - `app` unknown, required
  - `country` unknown, required
  - `platform` unknown, required
  - `measured` unknown, required
  - `change` unknown, required
  - `window` unknown, required
  - `ranks` unknown, required
  - `funnel` unknown, required
  - `downloads` unknown, required
  - `revenue` unknown, required
  - `recentChanges` unknown, required

## Other responses

- `400`: A parameter is missing or malformed.
- `401`: No key, or the key is not valid.
- `402`: This month's credits are used up.
- `403`: The key's plan or scopes do not cover this call.
- `404`: No such app, or Storelift has not measured it yet.
- `429`: Too many requests.

---

[API](https://skmtc.dev/storelift/apis/storelift-api.md) · [All operations](https://skmtc.dev/storelift/apis/storelift-api/llms.txt) · [OpenAPI document](https://skmtc.dev/storelift/apis/storelift-api/revisions/4489f2d077a4?raw)