Support & FAQ

Multiplication Bug uses spaced repetition, a learning technique supported by cognitive-science research. The app introduces new multiplication facts in small batches, then reviews them at increasing intervals (1, 3, 7, 14, 21, and 30 days). Facts your child finds difficult are reviewed more often, while well-known facts are spaced further apart.

A Daily Mission can include warm-up, new facts, targeted practice, and mixed review. Steps with no eligible questions are omitted.

Multiplication Bug is designed for children ages 6–9. The interface uses large, clear buttons and child-friendly language. A parental gate protects settings that children should not access.

Yes. The app supports up to 6 separate profiles, each with their own name, avatar, learning progress, and session history. All profiles are stored locally on your device.

Yes. Multiplication Bug is completely free, with every feature available from the moment you install it. There is no trial period, no subscription, no premium tier, and no paid unlock. It is free on both the App Store and Google Play.

No. There is no advertising and there are no in-app purchases of any kind. Your child will never see a banner, a video ad, or a paywall. The app also contains no analytics SDKs or tracking SDKs. The app itself works fully offline. After direct parental verification, it may open Apple or Google's native review flow, and a parent may choose to open the official store listing or privacy policy in a browser.

Multiplication Bug is available in 15 languages: English, German, Spanish, French, Italian, Dutch, Portuguese, Romanian, Polish, Turkish, Belarusian, Russian, Ukrainian, Indonesian, and Vietnamese. The app follows your device language automatically.

The app offers three types of learning sessions:

• Daily Mission — The main learning path. It can include warm-up, new facts, targeted practice, and mixed review; steps with no eligible questions are omitted.
• Practice — Extra reinforcement after your child has attempted at least five facts.
• Evening Review — A short session targeting 3–5 questions after 7 PM, informed by research on sleep-dependent memory consolidation. It can contain fewer questions when too few eligible facts are available.

To prevent fatigue and support healthy learning habits, the app has daily session limits. New profiles start on Just Right: 2 Daily Missions, 4 Practice sessions, and 1 Evening Review per day. Profiles carried forward from an older version may retain earlier Just Right limits of 1, 2, and 1 until a different intensity is selected.

If your child reaches a limit, Ask a Parent can grant one additional session for each session type that day. Parents can adjust practice intensity in Settings → For Parents → Practice Intensity.

There is a 15-minute cooldown between consecutive Daily Missions on the Just Right setting, including profiles that retain its earlier limits.

Switching to a different session type (for example, from Daily Mission to Practice) is immediate — no cooldown. Parents can skip the cooldown once from the session-limit screen.

Evening Review is informed by research on sleep-dependent memory consolidation. The app uses 7 PM local time as a simple availability threshold; it does not know your child's bedtime and does not guarantee a particular learning outcome.

The app monitors the five most recent answers in the current session. When fewer than two are correct, it gently pauses with encouragement. Your child can choose to continue or take a break and finish for the day.

When your child answers a fact correctly and quickly, its review interval can increase through 1, 3, 7, 14, 21, and 30 days. Well-known facts appear less often, freeing time for facts that need more practice.

An incorrect answer moves the fact to a shorter interval: established facts with strong recent accuracy step back one interval, while other facts reset to 1 day and may move back a learning stage.

Your child earns a streak day for each day they complete at least one session. The streak counter shows how many consecutive days they have practiced. The app also tracks their best streak ever achieved, which serves as a personal-best challenge.

Everyone needs a break sometimes. The app includes a grace day system: your child gets 1 free pass per calendar week (resetting each Monday). If they miss a single day and haven't used their grace day that week, their streak is preserved automatically. Missing 2 or more consecutive days resets the streak, but their best streak record is always saved.

Go to Settings → For Parents. You will see a verification screen that displays a 3-digit number written as words (for example, "five hundred and twelve"). Type the number using digits to proceed. This gate is designed to be easy for adults but difficult for young children.

The gate allows 3 attempts, then requires a 30-second wait before trying again.

A child is never sent directly to a review prompt or store listing. A native review request can happen only after an adult directly passes the parental gate and enough natural learning activity has occurred on that installation.

The first request can become eligible after five naturally completed Daily Missions on five local dates spanning at least seven days. A second and final request requires at least 30 days plus either five later Daily Missions across three local dates or one later table advancement. Apple or Google decides whether to display a prompt, and Multiplication Bug does not know whether a rating was submitted.

The separate Rate the app action is also behind the parental gate. It opens the verified App Store or Google Play listing and permanently stops future automatic review requests before the handoff. Neither action sends a child name, profile identifier, learning progress, response history, or review-policy payload.

You can adjust how many sessions your child can do each day:

• Just Right (default for new profiles) — 2 Daily Missions, 4 Practice, 1 Evening Review (15-min cooldown between Daily Missions)
• Extra Practice — 3 Daily Missions, 6 Practice, 1 Evening Review (no cooldown)
• No Limits — a high internal cap of 999 sessions of each type (no cooldown)

Profiles carried forward from an older version may retain earlier Just Right limits of 1 Daily Mission, 2 Practice sessions, and 1 Evening Review until another setting is selected. Change this in Settings → For Parents → Practice Intensity.

Reset Progress clears the profile's learning data (mastery levels, session history, and streaks) but keeps the child's name and avatar.

Delete Profile removes that profile, including its name, avatar, and learning history.

The separate anonymous installation-level review state is not part of a child profile and remains after either action. Both actions are irreversible and require parental verification.

Yes. Learning profiles and progress stay in app storage, and the developer does not collect child personal information or learning data. The app has no ads, analytics SDKs, or tracking SDKs.

Parent-only native review, official store, privacy-page, and standard device-backup interactions are handled by Apple, Google, or the selected browser under their terms. Multiplication Bug sends no child profile or learning payload with review or store actions. For full details, see our Privacy Policy.

Yes. Your child's learning data is automatically included in your device's standard backups:

• iPhone / iPad — included in iCloud and iTunes/Finder backups
• Android — included in Google Auto Backup

When you restore a backup to a new device, all progress, streaks, and session history come with it. No account or setup needed.

Note: This is device backup and restore — it does not sync data between multiple devices in real time.

You have two options:

• In-app: Go to Settings → For Parents → Delete Profile. This permanently removes that profile's name, avatar, and learning history; anonymous installation-level review state remains.
• Uninstall: Removing the app deletes app-owned local files, subject to the platform's standard backup and restore behavior. The developer has no server-side copy.