# David Klett

> David Klett is a seed investor in Berlin backing iOS and Apps. See 1 investments, check sizes, portfolio and contact details. Updated Oct 2026.

- Type: Angel Investor
- Location: Berlin, Germany
- Total investments: 1
- Last investment: Feb 2016
- Lead investor: 0%
- Last updated: Oct 2026

David Klett is a seed investor in Berlin focused on iOS and Apps. David Klett

## Contacts

5 contacts available for David Klett: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/david-klett?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| iOS | 1 | 100% |
| Apps | 1 | 100% |
| EdTech | 1 | 100% |
| Education | 1 | 100% |
| E-Learning | 1 | 100% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| MATH 42 | MATH 42 creates Intelligent Math Solutions.MATH 42's iOS app has achieved to provide high-quality automated private math tutoring to over 2.3 million middle-school and high-school students across the world — at a fraction of the costs of a private math tutor! With MATH 42 they can now understand and solve their math problems step-by-step andcontinually get better through adaptive assessment and training. Beyond having convinced students, MATH 42 is trusted by schools and teachers: The app is being use on over 450.000 iPads in schools around the world.The MATH 42 Technology is now being used by publishers to automate their product- and content- creation (f.e. exercises, sample solutions, work sheets, ...). With their mighty MATH 42 API they enable them, to approach the market with (1) new product, (2) better products, (3) in less time. They reduce their risk profile and give them the chance them to propel themselves into the digital age with unique products. With the data they gather, they're not only able to assess students proficiency but to understand how products of publishers are used and what needs to be changed objectively, to have better outcomes.MATH 42's goal is to fundamentally help all stakeholders in the math-education cycle — students, teachers, publishers. The MATH 42 Technology — that has been developed for almost 7 years — will set the worldwide gold standard for mathematics. | $558K | Seed | Feb 06, 2016 | http://www.cogeon.com |

1 of 1 investments shown.

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## Featured in investor lists
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## FAQ

### What does David Klett invest in?

David Klett invests primarily in iOS, Apps and EdTech startups, most often at Seed stage. Most of the 1 investments tracked by Shizune back companies in Germany. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact David Klett?

For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### When did David Klett last invest?

The most recent investment recorded for David Klett closed in Feb 2016. Shizune tracks 1 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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