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Zackly is a German vocabulary learning app with 10,000+ words across all CEFR levels (A1.1 to C2). It uses eight different game modes — including translation, article gender, fill-in-the-blanks, verb conjugation, listening, reading, sentence builder, and writing — to help vocabulary stick through active practice.

The app is available on iOS and Android and supports 10 native languages for translations.

Zackly covers all ten CEFR sub-levels: A1.1, A1.2, A2.1, A2.2, B1.1, B1.2, B2.1, B2.2, C1, and C2. You can set your default starting level in Settings, or switch levels at any time from the game setup screen.

Zackly has eight game modes:

Translation — Translate German words into your native language.
Articles — Practice der / die / das article gender.
Fill in the Blanks — Complete sentences with the correct word.
Verb Conjugation — Conjugate German verbs in various tenses.
Listening (Hören) — Identify spoken German words.
Reading (Lesen) — Read short passages and answer comprehension questions.
Writing (Schreiben) — Write German sentences with AI feedback.
Sentence Builder — Arrange words into correct German sentences.

Some modes require a Premium subscription.

Go to Settings → Preferences → Default Level and tap the level you want. This level will be pre-selected every time you open the game setup screen, though you can always change it before starting a game.

Go to Settings → Account & Security → Transfer Account. You'll receive a transfer code that you can enter on your new device during login to migrate your progress, saved words, and subscription status.

Yes. Use the account transfer feature to move your account between devices. Your progress and subscription will follow your account.

Go to Settings → Account & Security and tap the email row. Adding an email is coming soon — in the meantime, use the account transfer code to keep your account secure across devices.

Go to Settings → Preferences → Language. You can choose from 10 supported languages: English, Arabic, Greek, Persian, Hindi, Russian, Ukrainian, Chinese, Spanish, and Turkish.

Premium unlocks unlimited daily games across all modes, offline play (download games to play without internet), access to Writing (Schreiben) with AI feedback, unlimited saved words, and advanced analytics. The free tier includes a generous daily allowance of games and up to 20 saved words.

On iOS: Go to Settings → [Your Name] → Subscriptions, then tap Zackly to manage or cancel.

On Android: Open the Play Store → tap your profile → Payments & subscriptions → Subscriptions, then find Zackly.

You can also tap Manage Subscription inside the Zackly app under Settings → Account & Security.

Go to Settings → Account & Security → Manage Subscription → Restore Purchases. Make sure you're signed in with the same Apple ID or Google account used when you originally purchased.

Coupon codes are available for Free plan users. Go to Settings and find the Redeem Coupon card — enter your code and tap Redeem. Coupons grant a Premium trial for a set number of days.

Zackly collects gameplay data (XP, accuracy, streaks) to power your analytics and adaptive learning. Optionally, anonymised usage analytics help us improve the app — you can opt out at any time under Settings → Account & Security → Usage Analytics.

See our full Privacy Policy for details.

Go to Settings → Account & Security → Download My Data. This exports a summary of your game sessions, saved words, and account details.

Go to Settings → Account & Security → Danger Zone → Delete Account. Account deletion is scheduled and permanent — all your data including progress, saved words, and analytics will be removed. If you have an active subscription, cancel it first through your App Store or Play Store to avoid future charges.

Try the following steps:

1. Force-close and reopen the app.
2. Check your internet connection — some game modes require an active connection.
3. Update the app to the latest version from the App Store or Play Store.
4. Restart your device and try again.

If the problem persists, contact us with a description of the issue and your device model.

Make sure you are logged in before starting a game — guest progress is stored locally and may not sync. If you're logged in and still seeing issues, check your internet connection and try completing a game session fully before closing the app.

Email us at support@zackly.app with:

· Your device model and OS version
· App version (found in Settings → About)
· A description of what happened and steps to reproduce it

We read every report and aim to respond within 2 business days.