Comparison

504 vs Smart Wall

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

504

Master essential vocabulary with this language learning app. It offers clear definitions, example sentences, and native pronunciation for high-utility words. Engage with interactive games like flashcards and quizzes to reinforce learning and track your progress effectively.

Highlights
  • Essential vocabulary selection
  • Clear definitions and example sentences
  • Native pronunciation audio
  • Interactive learning games (flashcards, quizzes)
  • Progress tracking tools
  • Multi-language support
Features
Read full description

Build your vocabulary with 504 Words – a smarter way to learn languages. 504 Words is a language learning app that helps you master the most essential vocabulary through clear definitions, example sentences, and interactive games. Whether you're learning English, German, French, or future supported languages, this app is designed to make your progress efficient and enjoyable. Learn the right words We’ve carefully selected 504 high-utility words for each language, focusing on real-world usage and practical communication. Every word comes with: - A clear definition - An example sentence - Native pronunciation Practice through interactive games Make learning fun and effective with built-in study modes: - Flashcards to test your memory - Multiple choice quizzes to reinforce understanding - Listening games to improve your pronunciation and recognition skills These game modes make it easier to retain new words and stay engaged every day. Track your progress Stay motivated with performance tracking tools. Monitor the words you've mastered and focus on areas where you need improvement. Great for daily practice and long-term learning. Multi-language support Start with English, German, and French. More languages will be added soon. Whether you're a beginner or refreshing your knowledge, the app adapts to your level and pace. Designed for all learners 504 Words offers a clean, intuitive interface suitable for learners of all ages. Use it at home, in class, or while traveling. No ads, no distractions—just focused learning. Download 504 Words today and take the first step toward confident communication in any language. https://nefarius-apps.github.io/504/privacy-policy https://nefarius-apps.github.io/504/terms-of-use

About

Smart Wall

Features
Read full description

Smart Wall is an intelligent device that monitors your plant's health by various factors like soil moisture, water requirement, humidity, temperature, and automatically waters your plants whenever needed. The application is intended for educational institutions. With the service, students learn biology in a convenient and visual form and can track the status of the plant in real time.

Screenshots

5044 screens
Smart Wall4 screens

Verdict

The call

The clearest difference is in-app purchases: Smart Wall at none against 504's 13. Smart Wall also leads on ads (none vs shown) and iOS requirement (15.0 vs 18.0). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 504 sells 12 in-app purchases, starting at $4.99 per 7 days. Smart Wall asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 7 level
504 versus Smart Wall: the parameters behind the verdict, then further details
Parameter504Smart Wall
PriceFreeFree
Rating4.8 (4.6K ratings) — better—
Positive reviews73.0% of reviews—
Number of ratings4.6K — better—
Update frequencyFortnightlyFortnightly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size66 MB20 MB
Age rating4+4+
DeveloperNefarius AppsKlara Gardening d.o.o.

Bugs and requests

504

Reported bugs

3 issues
  • Pronunciation not working in latest version
  • Lessons for second half of book blocked behind paywall
  • Compatibility issues with older devices

Requested features

3 requests
  • Add part of speech for each word
  • Include a note box for personal examples
  • Add dark mode option

Smart Wall

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

504

Subscriptions11
  • Premium$4.997 Days
  • Weekly Pro Membership3 Days trial$8.997 Days
  • Weekly Premium Membership3 Days trial$9.997 Days
Show 8 more
  • Premium1 Month trial$9.991 Month
  • Premium$9.991 Month
  • Premium3 Days trial2 variants$9.997 Days
  • Monthly Pro Membership3 Days trial$17.991 Month
  • Monthly Premium Membership3 Days trial$19.991 Month
  • Premium$34.991 Year
  • Yearly Premium Membership3 Days trial$59.991 Year
  • Yearly Pro Membership3 Days trial$59.991 Year
One-time1
  • Lifetime Access$79.99
None

Smart Wall

No in-app purchases

Questions

Is 504 free?
504 is free to download, with in-app purchases available.
Is Smart Wall free?
Smart Wall is free to download, with no in-app purchases.
Do 504 or Smart Wall have ads?
504 shows ads; Smart Wall does not.
Which is updated more often, 504 or Smart Wall?
504 ships an update fortnightly, and Smart Wall fortnightly. Most recently, 504 was updated on October 25, 2026 and Smart Wall on October 27, 2026.

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