Kivvs
Science-backed learning.
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Kivvs — Master anything. Permanently.
You've probably tried an app. Maybe two or three. You collected streaks, earned trophies, and after a year had a handful of phrases to show for it. Not because you lacked dedication — but because those tools were never built to take you anywhere.
Maybe you tried an AI tutor instead. But a conversation that goes wherever you steer it isn't a curriculum — it's a mirror. You still had to know what to ask, what to practice, what came next. And you didn't. Because that's the whole point of having a system.
Not a flashcard app. A learning system.
Most learning tools track whether you've seen something. Kivvs tracks whether you actually know it — and builds every session from the ground up based on that distinction.
At its core is a concept-based learning engine. Where traditional SRS tools show you a card — a word, a definition, maybe a sentence — Kivvs builds a semantic map. Every concept is encountered across dozens of natural contexts, modalities, and uses: reading it, hearing it, writing it, producing it. Not "a car is a vehicle with four wheels" — but driving it, cleaning it, crashing it, describing its color, until the word lives in your mind the way it lives in a native speaker's.
And "concept" doesn't just mean vocabulary. The same system maps pronunciation: that the 'v' in "vine", and the 'f' in "of" land on the same sound — not because you studied a rule, but because you encountered them, in context, until your ear and mouth simply knew. It maps grammar the same way: you'll use the conditional, the subjunctive, complex tense constructions — correctly, automatically, in the right moment — because the system saturated you with the pattern across hundreds of natural examples until it became instinct.
Without studying a single rule.
Every session is assembled live, interleaving what you need to reinforce with what you're ready to acquire next. No static decks. No preset curriculum. A living system that adapts to your actual knowledge state.
Built on decades of research you've never benefited from
The science behind effective learning has existed for years. Frequency-based vocabulary progression. Phonological training that actually produces native-like pronunciation. Implicit grammar acquisition through massive contextual exposure — no rules to memorize, no theory to study. These methods are not experimental. They've simply never been applied together, at scale, in a consumer product.
Until now.
What acquisition actually looks like
Conventional language courses are built around the assumption that you'll plateau at basic conversational ability. Kivvs is not. The system is designed for complete fluency — the kind where you don't translate in your head, don't hesitate before speaking, and don't sound like a tourist. One lesson a day will get you there in a few years. Serious daily commitment can compress that dramatically.
Currently available: Language courses Spanish · French · Italian · Portuguese · English · German · Russian · Arabic
More languages in active development.
Coming soon: Music & Strategy.
Kivvs is being built for any domain where deep, structured knowledge matters.
Try Kivvs free for 30 days — full access, no restrictions. After that, a subscription is required to continue.
Learn more about the science behind Kivvs at:
https://www.kivvs.com/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Terms of Service: https://www.kivvs.com/terms
Privacy Policy: https://www.kivvs.com/privacy
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
New: Track your mastery from the menu and earn badges as you progress.
Improved interface translations.
Bug fixes and small improvements.
The developer, Guillermo Ariel Corrado, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Financial Info
- Contact Info
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Guillermo Ariel Corrado
- Size
- 72 MB
- Category
- Education
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- This app is rated 13+ with content restrictions.
Some content may be rated higher, and may therefore be restricted and managed by the developer through in-app controls. - In-App Controls
Age Assurance
Infrequent
Cartoon or Fantasy Violence
Profanity or Crude Humour
Mature or Suggestive Themes
Alcohol, Tobacco, Drug Use or References
Guns or Other Weapons
Contains
Advertising
- In-App Purchases
Yes
- Yearly Subscription USD 99.99
- Monthly Subscription USD 11.99
- Copyright
- © 2025 Guillermo Ariel Corrado