# How we rank apps across the stores

OpenApps Rank orders apps by where each store ranks and lists them over the last 28 days. Each store ranks its apps by their daily points on its popularity charts. An app's score adds 21 / (20 + its rank) from every store that ranks it, and 0.1 for its own connector on each of Perplexity and Muse. On November 5, 2026, Google Drive led with 3.07.

October 22, 2026 · 3 min read

- Window: 28 days
- Value of #1: 1 (#20 is worth 0.525, #100 is worth 0.175)
- Stores combined: 6 (ChatGPT, Claude and Cursor with Grok Bot by rank, Perplexity and Muse by listing)
- Leader on Nov 5: Google Drive (3.07, ranked or listed in every store)

![Illustration of four short columns of tiles, each topped by a coloured tile, with thin lines from the four top tiles meeting at a balance scale that weighs a single green tile.](https://theopenapps.com/assets/blog/how-openapps-rank-works/hero-6d48012f.webp)

*Illustration: OpenApps*

## Points from each chart

Each day an app earns points on every chart its store orders by popularity: 1 divided by its position. The top of a chart counts far more than the middle, and nothing below the chart's cap counts at all. An app's points in a store are the mean of those daily points over the last 28 days.

`points = Σ ( w × 1/p ) ÷ D`

- `Σ`: Every counted chart, on every day of the last 28.
- `w`: The chart's weight: 1 for a main popularity chart, 0.5 for a curated list, a home shelf or a subchart.
- `p`: The app's position on that chart that day. A position past the chart's cap (50 or 100) earns nothing.
- `D`: The days in the window the store has chart data for. A day the app is on no counted chart adds 0.

**Points per day by position**

| Position | Points |
| --- | ---: |
| #1 | 1 |
| #2 | 0.5 |
| #3 | 0.333 |
| #5 | 0.2 |
| #10 | 0.1 |
| #25 | 0.04 |
| #50 | 0.02 |

*On a chart with weight 1. A curated list, home shelf or subchart pays half.*

Each store's apps are ranked by those points. Points from different stores don't compare: ChatGPT counts 13 category lists, 3 curated lists and its home shelves, and Grok Bot one list, so 0.4 means something different in each. Ranks do compare, and the score is built from them.

## Which charts count

Only charts the store orders by popularity count. ChatGPT's category lists follow popularity through about #50 and launch order below it, so they stop counting at #50. Launch-ordered lists, such as Claude's New, count nowhere.

| Store | Counted charts | Weight | Cap |
| --- | --- | ---: | ---: |
| ChatGPT | The 13 category lists, such as Productivity and Finance | 1 | 50 |
| ChatGPT | [Popular](https://theopenapps.com/glossary/popular-list), New & Noteworthy, Small Business and the home shelves | 0.5 | 50 |
| Claude | [Most popular](https://theopenapps.com/glossary/most-popular-claude) and Connectors by popularity | 1 | 100 |
| Claude | Most popular's tag lists | 0.5 | 50 |
| Cursor | The directory's Top list | 1 | 100 |
| Cursor | Featured plugins | 0.5 | 50 |
| Grok Bot | Popular | 1 | 100 |

## The score

An app gets one score. Each store that ranks it adds 21 / (20 + its rank there), through its best listing. #1 is worth 1, and #1 in one store is worth about the same as #20 in two, so one big win doesn't outrank several good ranks. Grok Bot lists Cursor's marketplace, so it counts as Cursor: a plugin on both scores once, at the better of its two ranks. A store isn't weighted by its size, because no store publishes its audience to weight it by.

`score = Σ 21 / (20 + r) + 0.1 × L`

- `Σ`: Every store that ranks the app.
- `r`: The app's rank in that store, from its best listing there.
- `L`: How many of Perplexity and Muse show the app's own connector.

Perplexity and Muse count by listing, not by order. Perplexity's order is its own catalog's and Muse's is alphabetical, and neither helped the checks below. Each adds 0.1 when it shows the app's own connector. A connector that Pipedream or Merge runs for Perplexity adds nothing, because a third party's connector says nothing about the app.

**Google Drive's score**

| Store | Rank | Adds |
| --- | ---: | ---: |
| Claude | #1 | 1 |
| Cursor | #2 | 0.955 |
| ChatGPT | #3 | 0.913 |
| Perplexity | Listed | 0.1 |
| Muse | Listed | 0.1 |
| **Score** |  | **3.07** |

*Google Drive is #1 in Claude, #2 in Cursor and #3 in ChatGPT, and listed on Perplexity and Muse: 1 + 0.955 + 0.913 + 0.1 + 0.1 = 3.07. Its #3 in Grok Bot counts as Cursor, where #2 is better. Source: OpenApps data, Nov 5, 2026.*

The board ranks apps, connectors, extensions and MCP servers. It leaves out Claude Code plugins and Cursor rules, and numbers the listings left in each store 1, 2, 3 among themselves.

## Tier and momentum

- **Tier** is where an app stands today: Top 10 on any counted chart, Top 50, Charted, meaning on a counted chart at some point in the 28 days, or Listed, meaning only on Perplexity or Muse. Across stores it is the best tier of the app's listings.
- **Momentum** is the score minus the score 28 days earlier. It shows once there is an earlier window to compare with, and only ranks move it.
- **Days charted** and **peak**, on a store's board, are the days in the window with a counted position and the best position in it.

## Checked against installs

A chart position isn't a count of users, so we test the rank against the counts some stores publish: Claude's installs and popularity, and cursor.directory's installs. For each count, the score is computed from the other stores only and compared with the count by Spearman correlation. Grok Bot lists Cursor's marketplace, so it is left out with Cursor.

| Held-out count | Score from the other stores | Best single other store |
| --- | ---: | ---: |
| Claude installs | 0.59 | 0.57 |
| Claude popularity | 0.59 | 0.46 |
| cursor.directory installs | 0.30 | 0.31 |

*Spearman ρ over 86 to 372 apps per count, November 5, 2026.*

It beat the best single other store on Claude installs and Claude popularity and came within 0.01 of it on cursor.directory installs. The site has ranked apps by this score since November 2026.

> **In the API**
> 
> `scores_methods` gives the definition and validation, and `scores_apps` the board across stores ([API docs](https://theopenapps.com/docs/api)). A change to the definition gets a new version, computed beside the old one. The site shows `oa_rank@3`.

## See the data

- [Top apps across stores](https://theopenapps.com/charts/leaderboards)
- [The scores in the API](https://theopenapps.com/docs/api)
- [How to read rank changes](https://theopenapps.com/blog/how-to-read-rank-changes)