# Is This BS? Claim & Fact Check — By Prof Dave, Master Debater

> By Prof Dave, Master Debater (iPhone/iPad app by BUILT BY FOUNDRY, INC..)

- Source: https://appshunter.io/ios/app/is-this-bs-claim-and-fact-check/id6756127983 (this page in markdown: same URL + `.md`)
- Developer: [BUILT BY FOUNDRY, INC.](https://appshunter.io/developer/1792457041)
- Category: Education, Games, Puzzle, Trivia
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 64 MB
- Languages: American English
- Released: 2026-07-08
- Data updated: 2026-08-17
- User reviews in markdown: https://appshunter.io/ios/app/is-this-bs-claim-and-fact-check/id6756127983/reviews.md

## What is Is This BS? Claim & Fact Check?

Is This BS? is the science fact-checker by Professor Dave Explains, the trusted voice behind 4 million YouTube subscribers and 480 million views.

DAILY DEBUNK CHALLENGE
Every day, one viral science claim. Your job: spot the logical fallacy. It takes under two minutes. Build your streak, earn XP, and level up your Science Literacy score. The daily challenge is always free.

AI CLAIM CHECKER
Paste any claim, headline, or URL. Professor Dave’s app analyzes it in seconds and tells you whether it’s BS, legitimate science, or somewhere in between. Every result includes:
* A verdict with a confidence score
* The logical fallacies identified
* An evidence-based breakdown
* “How Dave Would Say It” — his signature direct take

FULL FALLACY LIBRARY
Learn 15+ logical fallacies with real-world examples and links to Professor Dave’s video breakdowns. From cherry-picking to false cause to conspiracy thinking, know them all.

SHAREABLE VERDICT CARDS
Generate a branded result card and share the truth on social media. Show receipts when someone spreads misinformation.

WHY IS THIS BS?
Professor Dave Explains has spent a decade teaching science and debunking pseudoscience on YouTube. Is This BS? puts that expertise in your pocket. Whether you’re checking a health claim from a family group chat, a headline on social media, or a conspiracy theory from a coworker, Dave’s AI has your back.

Built for students, skeptics, science enthusiasts, and anyone tired of misinformation. Is This BS? makes critical thinking a daily habit.

Check facts. Spot fallacies. Detect BS.

Privacy: https://www.builtbyfoundry.io/is-this-bs/privacy
Terms: https://www.builtbyfoundry.io/is-this-bs/terms
EULA: https://developer.apple.com/documentation/appstoreconnectapi/end-user-license-agreements-eula

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 12 Months | $29.99 | per year |
| 1 Month | $4.99 | per month |



## Version history (last 5 releases)

### 26.8.14 — 2026-08-14

- Meet The Debate Master, your new final challenge on the debate ladder, with refreshed dialogue throughout the fight and scorecard.
- Your stars and progress from the former final boss carry forward automatically.

### 26.8.1 — 2026-08-09

- Meet The Debate Master, your new final challenge on the debate ladder, with refreshed dialogue throughout the fight and scorecard.
- Your stars and progress from the former final boss carry forward automatically.

### 26.7.30 — 2026-07-30

- IsThisBS has a brand new app icon.

### 26.7.23 — 2026-07-24

- Small improvements to keep everything running smoothly.

### 26.7.20 — 2026-07-20

Includes stability and performance improvements.

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All apps by BUILT BY FOUNDRY, INC.: https://appshunter.io/developer/1792457041

## Related topics

[spot the fallacy](https://appshunter.io/ios/topics/spot-the-fallacy)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*