Brain Infinity vs 咲耶のおてつだいチャレンジ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Brain Infinity
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Math, logic, memory, attention and language in about three minutes. 10-question sessions, 30 levels, 3,000 English and 3,000 Japanese questions, with a brain companion. ■ Reasoning challenges 900 four-choice puzzles in 15 formats across 5 areas. Runs of 10 at Easy, Standard or Hard clear with 5, 7 or 9 correct; 45–120 seconds per question. See guides, clues and explanations, with diagrams for some puzzles. Resume anytime. ■ Training and Action Lab Normal runs mix 7 focus, 2 review and 1 stretch questions, with fewer repeats. Hints give clues; review explains why. Up to two reports per run; offline reports retry later. Action Lab has 10 hands-on formats: numbers, patterns, memory, attention and words. Play 10 untimed puzzles at three difficulties. Progress and bests are saved. Starting and resuming attempts is free. ■ Training builds a colony Build seven colonies, each with six facilities up to Lv.10, using Lumina and Core levels from training. Open rooms, follow flagged goals and meet the crew. Restore 36 areas per colony for journals and the next colony. Command three companies, capture generators and reclaim the core within four minutes. Upgrades strengthen your side; area difficulty is fixed. Practice is free. Expeditions restore equipment without Lumina or XP. ■ Records and community Infinity ends after three mistakes or timeouts. Composite anomaly starts with 45 seconds, extended by correct answers. Rankings show this week, last week and all-time records. You join automatically; your name and new records are public. Opt out in Settings. The Community feed shares your name, bests, streak milestones and main missions. Celebrate milestones. Sharing starts on; turn on Opt out of sharing achievements in Settings to stop new posts. Published posts remain. Sharing, rankings and analytics have separate controls. No free-text posts, images or chat. ■ Review and daily goals The notebook keeps 200 misses from all modes. Filter by category and retry up to 10 pending questions for double Lumina and Core XP per answer. Reviewed entries are read-only. Normal training and challenge runs award 1 Lumina and 10 Brain Core XP per answer, right or wrong; skips, unanswered timeouts and reports do not. Daily missions cover training, reasoning and Action Lab. Finish all three for a calendar mark. Track medals, streaks and all 30 levels. Research Lab shows your Brain Core and Neural Index, an in-game indicator, not a medical or intelligence assessment. Normal questions allow 30 seconds, including time away from the app. A silver medal (80%) unlocks the next level. Bronze 60%, silver 80%, gold 100%. ■ Optional accounts and cloud saves Play without linking an account; progress stays on your device. Link Google or Apple in Settings to save progress, your name and birth year privately in the cloud and restore on another device with the same account. Birth year is not public. If both saves changed, choose one; XP and items are not combined. Purchases and ad/analytics consent are not transferred. Unlink or request account deletion in Settings. Deletion starts removing public data and holds the last cloud save and app account for 30 days before permanent deletion. Cancel with the original account during that period to restore the last cloud save. Public data and unsynced changes are not restored. ■ Display, ads and data VoiceOver, large text, high contrast, reduced motion, effect captions and three music tracks. Set reminders and sound in Settings. A banner appears at the end of Lab. A full-screen ad may appear before results, at most once per five completed runs, never while answering. The optional one-time Remove ads purchase hides both, with no renewal. Every puzzle plays without it; restore with the same store account. Questions work offline. Purchases, ads, rankings, feed, cloud/accounts, reports and analytics need a connection. Analytics runs after the age check while sharing is on; stop it in Settings. See the Privacy Policy.
咲耶のおてつだいチャレンジ
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「咲耶のおてつだいチャレンジ」は、お子さまがお手伝いを通じて「お金とのつきあいかた」を楽しく学べる、和風ポップな金融教育アプリです。 ■ お手伝いで「円」がたまる おうちのお手伝いをして「やった!」を押すと、金貨が貯金びんに舞い込んで「円」がたまります。がんばりが目に見えてたまっていくので、「えらい!」が実る体験になります。 ■ ほしいもののために「ためる」を学ぶ 「ほしいもの」を目標に設定すると、あといくらで届くかがひと目でわかります。使う・渡すの記録もでき、計画的にお金と向き合う力が自然と身につきます。 ■ 集めて楽しい、続けたくなる ・77体のなかまキャラクターを、宝箱を開けて集められます(4段階のレアリティ) ・50種類のごほうびシール ・レベルアップ、毎日のログインボーナス、お誕生日のスペシャルプレゼント ・案内役の咲耶がかわいい声で応援してくれます ■ おうちの人にやさしい設計 ・お手伝いの内容や金額は、保護者が自由に登録・編集できます ・保護者メニューは暗証番号(Face IDにも対応)で保護。お子さまの誤操作を防ぎます ・「承認モード」をオンにすると、保護者がOKしてから残高に加算されます ・兄弟姉妹など、複数のお子さまを登録できます ■ 安心・安全 ・広告表示はありません ・アプリ内課金はありません ・完全オフラインで動作し、インターネット通信を行いません ・個人情報を一切収集・送信しません。データはすべて端末内にのみ保存されます 毎日のお手伝いが、親子の笑顔とお金の学びにつながりますように。
Screenshots
Verdict
The clearest difference is in-app purchases: 咲耶のおてつだいチャレンジ at none against Brain Infinity's 1. 咲耶のおてつだいチャレンジ also leads on update cadence (every 2 days vs every 5 days) and iOS requirement (13.0 vs 15.0). On price, ads 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. Brain Infinity sells 1 one-off in-app purchase. 咲耶のおてつだいチャレンジ asks for nothing beyond the download.
Brain Infinity ships an update every 5 days, 咲耶のおてつだいチャレンジ every 2 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Brain Infinity | 咲耶のおてつだいチャレンジ |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 20.0% of reviews |
| Update frequency | Every 5 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 72 MB | 102 MB |
| Age rating | 4+ | 4+ |
| Developer | YUTA UEDA | Nihon no Inaka ha Shihonshugi no Frontier da LLC. |
In-app purchases
Brain Infinity
- Remove Ads$2.99
咲耶のおてつだいチャレンジ
No in-app purchases









