Math Lock vs MindStack Flashcards
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Math Lock
This app transforms screen time into a learning opportunity for children aged 4-15. It requires solving math problems to unlock the device and offers guided practice, a private tutor, and brain training exercises. Parents can manage screen time while children engage with a fun, curriculum-based math experience.
- Math challenges to unlock device
- Curriculum-based math for ages 4-15
- Personalized questions by level
- Private Tutor with photo solving
- Brain training activities
- Parental controls
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Math Lock is a smart and engaging learning app that helps kids build math skills while giving parents more control over screen time. Designed for ages 4 to 15 (Year 0–10), Math Lock turns your device into a learning tool by requiring children to solve a math challenge before unlocking. But Math Lock is more than a lock screen app. It also includes guided practice, a Private Tutor, photo-based math help, and brain training features that make learning more interactive and useful every day. Questions are adapted by level, helping children progress from basic number recognition and simple equations to fractions, ratios, negative numbers, algebra, and more. Parents can support better habits and focused learning, while children enjoy a playful, colourful experience. Perfect for families who want learning, practice, and screen control in one app. Features: Lock screen with math challenges Curriculum-based math for Year 0–10 (ages 4–15) Auto-generated questions tailored to your child’s level Practice mode for daily maths learning Private Tutor with Ask, Snap, and Learn modes Step-by-step explanations for solving maths problems Photo solving for worksheets, textbooks, and handwritten questions Topic-based learning, including equations, fractions, ratios, and algebra IQ Test and brain training activities Parent settings and control support Fun, child-friendly design that encourages confidence and consistency Make screen time smarter with Math Lock. Terms of Service: https://mathlockapp.com/terms Privacy Policy: https://mathlockapp.com/privacy
MindStack Flashcards
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MindStack helps you remember what you study. Build flashcards by hand, or let the AI do it for you — paste text, drop a PDF, snap a photo of your notes, or just type what you want ("20 cards on the Krebs cycle"). The cards then come back to you using FSRS spaced-repetition scheduling, so you only review what you're about to forget. While studying, tap Hint for a nudge or Explain for a quick breakdown when you get something wrong. Run Audit on any deck and the AI flags duplicates, leaky questions, and cards that need a rewrite. Three card types (Q&A, cloze, term and definition), light and dark themes, streaks with freezes for the busy weeks, a +5 daily boost when you want to push, and a home screen widget showing what's due today. iCloud backup is automatic. Anki .apkg imports in two taps. Works offline once your decks are downloaded. The full study engine is free. AI features (generation, Audit, Hint, Explain) include a 30-day trial, then Pro. Built for students, language learners, and anyone who'd rather remember things than re-learn them next month. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.kalimaharabic.co.uk/mindstackprivacypolicy
Screenshots
Verdict
The clearest difference is ads: MindStack Flashcards at none against Math Lock's shown. Math Lock's advantage is iOS requirement (16.6 vs 26.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Math Lock sells 2 in-app purchases, starting at $2.99 per month and MindStack Flashcards sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Math Lock | MindStack Flashcards |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 118 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | SPARKHIVE TECH LTD | harris khalid |
In-app purchases
Math Lock
- Math Lock Premium3 Days trial$2.991 Month
- Math Lock Premium Yearly3 Days trial$29.991 Year
MindStack Flashcards
- Pro Monthly$4.991 Month
- Pro Annual1 Month trial$19.991 Year
Questions
Is Math Lock free?
Is MindStack Flashcards free?
Do Math Lock or MindStack Flashcards have ads?
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