Stable signalNo paid features detectedMedium-risk permissions

A/B Pre-test Calculator by Speero

Speero's A/B Pre-test Calculator helps you answer vital pre-test questions like MDE, sample size, duration, and more.

Users1KCurrent public install base

Rating--Store average score

Reviews0Public review volume

Manifest versionV3Extension platform version

7-day growth0Net users gained this week

7-day growth rate0%Relative weekly velocity

Preview

A/B Pre-test Calculator by Speero Media preview

4 assets

Trend

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User Growth Over Time

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7-day growthFlat

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30-day growthFlat

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Technical snapshot

Version, languages, and crawl freshness

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Version1.4

ManifestV3

Size41.2KiB

Languages1English

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

Speero's A/B Pre-test Calculator helps you answer all important pre-test questions like:

— What is the minimal detectible effect I can test for?

— How long should I test for considering the effect?

— What's the sample size?

— How to use Speero's A/B Pre-test Calculator? —

Type in the number of weekly sessions or users, conversions, and a number of test variants, and see if your website has the capacity to test your ideas.

Reviews

Recent review snapshot

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Store average score--Chrome Web Store aggregate rating, including ratings without synced review text

Synced text average--Average computed only from synced review bodies below

Reviews with text0Synced review bodies

Total ratings / reviews0Chrome Web Store public rating/review count

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5★

4★

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1★

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AI product read

A/B Test Pre-test Calculator

Helps users determine if their website traffic is sufficient to detect statistically significant results in an A/B test, and calculates required sample size, duration, and minimal detectable effect (MDE).

User opens extension -> Logs in with Google (optional for manual mode) -> Selects GA4 account/property or enters manual traffic/conversion numbers -> Clicks Calculate -> Extension fetches data from GA4 API (if logged in) or uses manual input -> Calls Speero's calculator API -> Displays results for MDE, duration, and sample size.

Target users: Product managers / Data analysts / UX researchers / Marketers running A/B tests

The extension relies on a hardcoded API token for the calculator backend, which may limit scalability or indicate a development/staging environment (speero-dev.cloudfunctions.net).
The analysis is based on static code analysis; runtime behavior of the Speero backend API is not fully observable.

Monetization

No paid features detected

The extension does not implement any payment gating, subscription checks, or billing logic. It uses a hardcoded API token to call a Speero calculator function, but there is no evidence of a paid tier, upgrade prompt, or license validation within the extension code. The extension appears to be a free tool provided by Speero to facilitate A/B testing calculations using GA4 data.

Confidence: 90
Payment platform: --
Source: AI / High
Login required: Yes
Reason: The extension requires a Google account login to access Google Analytics 4 (GA4) data. The manifest declares OAuth2 scopes for analytics.readonly and userinfo.email. The code uses chrome.identity.getAuthToken to obtain a Google OAuth token. Without this login, the extension cannot fetch account summaries or run reports from the GA4 API, which is the core data source for the calculator. While manual input is possible, the primary workflow described in the store and implemented in the code relies on connecting to a GA4 property.

Permission risk

Medium-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：storage

Publisher

Speero

Speero Tools

Email: [email protected]
Phone: +12108338520
Address: 901 S MoPac Expy Austin, TX 78746 US

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