Comparison

Complicated problem solving vs DeFind

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

Head to head
About

Complicated problem solving

Features
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Master the art of complex problem-solving with Complicated Problem Solving. Our app is based on the Fermi problem, a method of breaking down complex problems into simpler components using logical and data-driven thinking.Β  By answering a series of simple questions and analyzing data, you'll develop the skills necessary to tackle even the most challenging problems. Our app features a user-friendly interface and a variety of customizable options, allowing you to tailor your problem-solving process to your unique needs and preferences.Β  With our comprehensive tools and resources, you'll be fully equipped to solve complex problems in any area of life. Experience the power of logical and critical thinking with Complicated Problem Solving.Β  Download now and start developing your problem-solving skills today!

About

DeFind

Features
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The app DeFind will be your unchangeable helper in learning English for long time because only there you can add all new words to your personal sets with a single click. Fast, convenient, informative - all these words are about DeFind. Learn quickly, easy and with pleasure. Why do you have to try out our app? You’ll have your personal account where all your words and phrases will be saved. You can access your personal vocabulary any time you need it. User-friendly design ( forget about long registration and dull instructions how to use the app) Log in and start learning. You can form your personal sets with Br/Am transcription, meaning, example and translation for every word. There’re lots of exercises to learn and recap your personalized vocabulary. An opportunity to choose the language of the app which is more comfortable for you to speak. Vast database of more than 85 000 words. Of course, it isn’t all. We are constantly working on the developing and widening of our base. Only there you can find all meaning of a word with precise examples for each of them. Learn and add all new words to your personal vocabulary with ONE click. Do you want to learn words easy and swiftly? Do you want to memorize words for long time and not to forget them the next day after you’ve learnt them? Or are you in a search of a captivating and convenient way of learning English? Then, for sure, our app DeFind is for you. For your progress. For your English. For your development. Download it and a new world of English will open in front of you! Free Plan Access to basic features for learning English words. Ideal for casual learners who want to start their journey. Plus Plan Unlock additional powerful features for a richer learning experience: Unlimited Presets Access – Explore all available learning presets to enhance your study sessions. Share Sets via Link – Easily share your word sets with friends, classmates, or colleagues. Offline Learning – Save your sets locally and continue learning even without an internet connection. Create Custom Words and Phrases – Personalize your learning by adding your own words and phrases. More Word Slots – Enjoy larger sets with more words for advanced learning. Extra Theme Colors – Choose from additional color themes to customize your learning interface. DeFind Plus subscriptions will be charged to your Apple account. Your monthly($2.99) or annual($24.99) subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage your subscriptions in your Account Settings after purchase. Terms of Service: https://fiveipproject.com/terms_and_conditions.html Privacy Policy: https://fiveipproject.com/privacy_policy.html

Screenshots

Complicated problem solving4 screens
DeFind4 screens

Verdict

The call

The clearest difference is in-app purchases: Complicated problem solving at none against DeFind's 2. Complicated problem solving also leads on update cadence (every 9 days vs every 6 weeks) and iOS requirement (14.0 vs 26.0). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. DeFind sells 2 in-app purchases, starting at $2.99 per month. Complicated problem solving asks for nothing beyond the download.

UpkeepUpdate frequency

Complicated problem solving ships an update every 9 days, DeFind every 6 weeks. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

Scorecard3 real differences Β· 3 level
Complicated problem solving versus DeFind: the parameters behind the verdict, then further details
ParameterComplicated problem solvingDeFind
PriceFreeFree
Update frequencyEvery 9 days β€” betterEvery 6 weeks
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPod β€” betteriPhone
Requires iOS14.0 β€” better26.0
Further details β€” not scored
Size48 MB78 MB
Age rating4+4+
DeveloperMan Hung SunOleksandr Kushpel

In-app purchases

None

Complicated problem solving

No in-app purchases

2 purchases

DeFind

Subscriptions2
  • Monthly$2.991 Month
  • Annual$24.991 Year

Questions

Is Complicated problem solving free?
Complicated problem solving is free to download, with no in-app purchases.
Is DeFind free?
DeFind is free to download, with in-app purchases available.
Do Complicated problem solving or DeFind have ads?
Neither Complicated problem solving nor DeFind shows ads.
Which is updated more often, Complicated problem solving or DeFind?
Complicated problem solving ships an update every 9 days, and DeFind every 6 weeks. Most recently, Complicated problem solving was updated on October 6, 2026 and DeFind on October 12, 2026.

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