BlueGrays vs SwipeDrill
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BlueGrays
Learn electronics with interactive projects, a component catalog, and personal inventory management. Start with free projects and unlock full access to Arduino, ESP32, and IoT content with a premium subscription. Gamified learning with badges and levels keeps you motivated.
- Free starter projects
- Unlimited Arduino/ESP32/IoT projects
- Detailed circuit diagrams and code
- Component catalog with specifications
- Personal inventory management
- Gamified learning with badges and levels
- Multi-language support
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Learning electronics has never been this easy and fun with BlueGrays! Start with free projects right away, and unlock all content with Premium when you're ready. Whether you're a student or a hobbyist, BlueGrays gives you everything you need. — START FOR FREE — • Begin learning electronics with curated starter projects • Explore basic components and their specifications • Try the app and see if it's right for you — EXPLORE PROJECTS (Premium) — • Unlimited access to Arduino, ESP32, ESP8266 and IoT projects • Detailed circuit diagrams, code snippets, and video tutorials for each project • See required components and add missing ones to your inventory • Rate projects and save your favorites • Track your completed projects — COMPONENT CATALOG (Premium) — • Full access to extensive electronic component database • Detailed specifications and use cases • Filter, sort, and easily find what you need • Add components directly to your inventory — MY WORKSHOP - PERSONAL INVENTORY (Premium) — • Track the components you own • Add quantities, notes, and custom names • Check for missing components before starting a project • Edit and update your inventory anytime — BADGES & LEVELS — • Earn achievement badges as you learn • Reach Bronze, Silver, Gold, Platinum, and Diamond tiers • Track your progress across categories • Stay motivated with gamified learning! — MORE FEATURES — • Push notifications for new projects • Multi-language support (TR, EN, DE, ES, FR, IT) • Favorites and completed projects list • Personal profile and progress tracking BlueGrays is built for the maker and electronics community. Download now and start your electronics journey for free! — SUBSCRIPTION INFORMATION — • BlueGrays Premium unlocks unlimited access to all projects, the full component catalog, and the My Workshop inventory feature. • Payment is charged to your Apple ID account upon confirmation of purchase. • Subscription automatically renews unless cancelled at least 24 hours before the end of the current period. • You can manage and cancel your subscription in Settings > Apple ID > Subscriptions after purchase. • Privacy Policy: https://bluegrays.com/privacy/ • Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SwipeDrill
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Python is the world's most popular language. Do you actually know it? SwipeDrill: Python turns the official Python documentation into daily swipe quizzes, going beyond syntax to test real understanding. List comprehensions, generators, decorators - the concepts that separate good Python from great Python. HOW IT WORKS Each card shows a statement about Python behavior or concepts. Swipe right if it's true. Swipe left if it's false. Get an instant explanation that builds genuine understanding, not just pattern recognition. WHAT YOU'LL MASTER - Python Basics: interpreter, syntax, and execution model - Data Types: strings, numbers, booleans, and type conversion - Control Flow: conditionals, loops, and comprehensions - Functions: arguments, scope, closures, and decorators - Collections: lists, tuples, sets, dicts, and operations - Files: reading, writing, context managers, and paths - Modules: imports, packages, and the standard library - Errors: exceptions, handling, and raising 800+ questions. Sourced from official Python documentation. WHO THIS IS FOR - Developers leveling up beyond beginner Python - Data scientists reinforcing core language fundamentals - Engineers preparing for Python technical interviews - Students in CS, data science, or automation courses - Anyone who learned from tutorials and wants real depth PREMIUM FEATURES Upgrade once. Use forever. - Sequential Mode: work through all questions in order - Bookmarks: save tricky questions and review them later - Detailed Stats: track accuracy and progress per category - No Ads: completely ad-free experience STUDY SMARTER - Daily Goal tracker: build a consistent study habit - Streak counter: keep your momentum going - Review Mode: replay only the questions you got wrong - Today's Concept: a new featured topic every day - Works offline: questions bundled in the app A NOTE ON CONTENT All questions are based on official Python documentation. Content may occasionally reflect behavior specific to certain Python versions. Always verify critical details against the latest official Python docs. Know Python. Really know it. Download SwipeDrill: Python today.
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Verdict
The clearest difference is iOS requirement: SwipeDrill at 13.0 against BlueGrays's 15.1. On price, ads, 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. BlueGrays sells 6 in-app purchases, starting at $2.99 per month and SwipeDrill sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | BlueGrays | SwipeDrill |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (11 ratings) — better | — |
| Positive reviews | 64.3% of reviews | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 6 days | — |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 51 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Yunus Emre Eke | kenji kuroki |
In-app purchases
BlueGrays
- Premium (Monthly)$2.991 Month
- Premium (Yearly)$11.991 Year
- 5x Aylık Eğitimci Paketi$12.99
- 10x Aylık Eğitimci Paketi$23.99
- 5x Yıllık Eğitimci Paketi$53.99
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- 10x Yıllık Eğitimci Paketi$101.99
SwipeDrill
- Unlock Premium$3.99
Questions
Is BlueGrays free?
Is SwipeDrill free?
Do BlueGrays or SwipeDrill have ads?
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