Rad IQ vs HelloJapan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rad IQ
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Rad IQ is a fast multiple-choice quiz with a wheel of fortune for knowledge categories. Spin the wheel, get a category, and answer questions from different topics. Climb the points ladder, secure your winnings at important milestones, and collect points for extra tokens. Features: Quiz wheel with random knowledge categories Categories such as Geography, History, Science, Sports, Music, Mythology, Food & Drink, and General Knowledge Points ladder with safe milestones 50:50 help and answer help using tokens Extra time option for a longer response time Optional category selection Statistics for games, questions, correct answers, and accuracy Multilingual interface Rad IQ is easy to start, but challenging enough to test your knowledge again and again.
HelloJapan
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This app is for people who want to know about Japanese culture
Screenshots
Verdict
The clearest difference is in-app purchases: HelloJapan at none against Rad IQ's 3. HelloJapan also leads on update cadence (every 5 days vs every 132 months). Rad IQ's advantage is device support (3 vs 1) and iOS requirement (16.2 vs 27.0). On price and ads 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. Rad IQ sells 3 one-off in-app purchases. HelloJapan asks for nothing beyond the download.
Rad IQ ships an update every 132 months, HelloJapan every 5 days. The most recent releases landed on October 14, 2026 and September 29, 2026 respectively.
| Parameter | Rad IQ | HelloJapan |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 132 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 16.2 — better | 27.0 |
| Further details — not scored | ||
| Size | 15 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Horatiu Rosca | Office Proteus |
In-app purchases
Rad IQ
- Extra Time$0.99
- Unlock Categories$0.99
- Unlimited Questions$1.99
HelloJapan
No in-app purchases
Questions
Is Rad IQ free?
Is HelloJapan free?
Do Rad IQ or HelloJapan have ads?
Which is updated more often, Rad IQ or HelloJapan?
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