/OpenOpen, for language learners.
Our only stakeholders are language learners — not investors. Transparency keeps us true to our goal of making the most useful language learning app.
👇 Here's where the time, money, and progress go.
Learner Progress
Lessons Completed — Daily
The Numbers
App Installs — Daily
What Learners Are Studying
Lessons Completed
Total (Last Month)
Spend & Revenue
Total Expenses
$175,108
Net Revenue
$8,221
Monthly Spend & Revenue
What Your Subscription Supports
- Marketing35%$61,570
- Infrastructure27%$47,354
- People17%$30,595
- AI Inference9%$16,172
- Illustrations & Animations4%$6,497
- Tools & Services3%$4,638
- Language Learning2%$4,006
- Taxes & Fees2%$3,047
- Platform Fees1%$1,108
- Other0%$120
Funding
Updated August 10, 2026
VCs & Outside Investors
$0
Personal Savings
$195,000
Loans from Family
$40,000
Bubblegum Makers
Product Roadmap
In Progress
Meta Ads in English
Paid ads on Meta, tuned so each dollar we spend brings in new learners profitably.
Content in English
Making our own videos and posts, so our growth doesn't depend on paid ads alone.
Planned
Meta Ads in More Languages
Reaching people in their own language, so we can grow far beyond the English-speaking audience.
Later
Japanese, Mandarin, and Cantonese
Natural extensions of Korean thanks to Hanja and shared vocabulary.
Native-language app localizations
Learn Korean in your actual native language, not only in English.
Why Freemium
Free to read in English
Lessons are shared in English so more people can read and learn from the same ones. Anyone can read them without paying.
Pro for serious learners
The AI behind your lessons costs a lot to run. Learners who want more subscribe, and that keeps the experience strong for everyone.
Learning over profit
We put that money into the very best experience, with no compromises, because we care more about how much you learn than how much we earn.
How We Got Here
2024
JulyFirst prototypes using LLMs to generate comprehensible input for language learners.
2025
NovemberBubblegum arrives on the App Store.
DecemberBubblegum arrives on Google Play.
2026
AprilLaunched /open — finances, metrics, and salaries, public.
MayA learner in Thailand became our first Bubblegum Pro subscriber, on an annual plan.