# Ttokttoki Lina

> Build the habit of pausing before a suspicious screen

Practice spotting manipulative interfaces through purchase-free simulations, a 19-pattern field guide, adaptive review and senior-friendly accessibility.

- Developer: CommonSource
- Category: Education
- Platforms: iOS
- Version: 1.0.3
- Minimum iOS: 16.6
- Official product page: https://commonsourcelab.com/en/apps/ttokttoki-lina

## Key experiences

### Do more than memorize names. Learn how suspicious screens behave.

Nineteen dark patterns are organized through four lenses—sneaking, misdirection, obstruction and pressure—with plain-language cues and defensive actions for each.

- The classroom organizing nineteen patterns through four lenses
- Field lessons covering cancellation barriers and hidden information
- A plain-language explanation of emotionally manipulative wording

### Pause, inspect and decide without making a real purchase.

Work through simulated shopping and subscription interfaces with a clear mission. Hints point back to evidence and next actions instead of choosing the answer for you.

- A simulated shopping mission checking the basis of a discount
- An observation hint that points to missed evidence and remaining actions
- Feedback explaining the choice and overlooked pattern in plain language

### Turn every missed cue into evidence for the next decision.

After each mission, the app surfaces the habits practiced—not just a score. Seven-day and lifetime views reveal first-choice accuracy, streaks and patterns worth revisiting.

- A completion view summarizing score, badges and new defensive habits
- Progress tracking for first-choice accuracy, streaks and safety level

### Adapt the classroom to the eyes and hands using it.

Adjust text size and Korean speech speed, enable higher contrast or reduced motion, and choose whether Lina reads goals or offers spoken encouragement.

- Accessibility controls for text, speech and screen motion

## Essential features

- **Practice without real purchases**: Explore simulated shopping, free-trial, subscription and sign-up screens to uncover hidden costs, preselected options and cancellation barriers.
- **A guide to 19 dark patterns**: Classify suspicious cues through four lenses—sneaking, misdirection, obstruction and pressure—and learn a practical response to each pattern.
- **Review shaped around weak spots**: On-device results, choice order, response time and hint use shape review sessions around the patterns you miss most.

## Made for

- Older adults who find payment and subscription screens unfamiliar
- Families practicing safer smartphone habits together
- Community educators teaching practical digital literacy

## Privacy and notes

No account or real purchase history is required; learning data stays on-device. The app teaches consumer awareness and does not provide case-specific legal or financial advice.

## Frequently asked questions

### Can a practice mission make a real purchase or account?

No. Every mission runs in a simulation separated from real services, so it cannot purchase, subscribe or create an account.

### Which dark patterns can I learn about?

Nineteen patterns—including hidden renewal and costs, preselection, false discounts, disguised ads, cancellation barriers and time pressure—are organized through four learning lenses.

### Is it designed for older adults?

Yes. It supports large text, generous touch targets, high contrast, reduced motion and Korean text-to-speech.

## Download

- [App Store](https://apps.apple.com/us/app/%EB%98%91%EB%98%90%EA%B8%B0-%EB%A6%AC%EB%82%98-%EC%8B%9C%EB%8B%88%EC%96%B4-%EC%8A%A4%EB%A7%88%ED%8A%B8%ED%8F%B0-%EC%95%88%EC%A0%84%EA%B5%90%EC%8B%A4/id6801809565)