AnsSheet vs Onikeisan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AnsSheet
This app acts as an electronic answer sheet for workbooks, helping users track their study progress and identify weak points. It records exercise cycles, analyzes mistakes, and provides detailed results to boost motivation and improve learning efficiency.
- Electronic answer sheet for workbooks
- Records exercise cycle count and interval
- Analyzes weak points and mistaken questions
- Filters and resets incorrect question counts
- View exercise drill book results
- Track learning status for all subjects
- Map view of incorrect question areas
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- Few answer space of workbook! - Needs time recording for doing workbook! - Needs management of all subjects status! In such a case, please try AnsSheet. AnsSheet is the electronic answer sheet for use with your workbook(Question is not attached). A recording of your exercise cycle (count, interval) helps to keep your study schedule and keeps your motivation. Also, you can analyze your weak points by confirming an often-mistaken question. It is important to repeat the exercise to get a fixed memory. AnsSheet helps your exercise of drill book. [ FEATURES ] - Question type is a true/false question (each option must be answered true/false in case of multiple-choice question) - Depending on the workbook, you can select multiple-choice question or single question as a question style. - You can select not only “forward” but also “reverse” as a question order. - Also, you can answer only the incorrect question numbers by extracting them. * Filtered by incorrect count * Reset incorrect count - View the result of the exercise drill book * Incorrect rate, incorrect question numbers * Elapsed time and average answer time per one question(You can make a time plan for the exam) - View learning status for all subjects(for pacemaker of your learning, checking weak points) * Elapsed date from the last exercise * Incorrect rate of the last exercise * Incorrect question number of each subject(latest, total) * Map view shows incorrect question area(Confirming the area where incorrect answers concentrate in your workbook)
Onikeisan
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「鬼計算 - N-Back 脳トレ」は、次々と表示される計算問題の「N問前の答え」を記憶して答える、シンプルながら奥深い脳トレゲームです。ワーキングメモリ(作業記憶)を効果的に鍛え、集中力や情報処理能力の向上を目指しましょう! 【ゲームのルール】 画面に「A + B = ?」のような簡単な計算式が1問ずつ表示されます。 あなたの役目は、今表示されている問題ではなく、「N問前に表示された問題」の答えを入力することです。(Nは選択した難易度によって変わります) 1問目(1-Backの場合)は答える必要はありません。 各問題には短い制限時間があります。素早く、正確に答えましょう! 1セットは最大5分間。時間内にできるだけ多くの問題に挑戦しましょう。 【主な機能】 選べる難易度「N-Back」: 最初は簡単な「1-Back」(1問前の答え)からスタート。 正答率90%以上を達成すると、より難しい「2-Back」「3-Back」…と、最大「20-Back」までのレベルがアンロック!自分の限界に挑戦できます。 集中力を高める時間制限: 1セット5分間の集中トレーニング。 各問題にも10秒の時間制限があり、テンポよく進められます。 毎日の習慣化をサポート: 連続プレイ日数と自己ベストを記録する「ストリーク機能」。 指定した時間にトレーニングを促す「デイリー通知機能」(ON/OFF、時刻設定可能)。 成長を実感「プレイ履歴」: 過去のプレイ結果(日付、N-Backレベル、スコア、正答率)を確認できます。 分かりやすいチュートリアル: 初めての方でも安心。ゲームのルールと操作方法を丁寧に解説します。 シンプルで使いやすい入力: 押し間違いの少ない、専用の数字キーパッドを採用。 【こんな方におすすめ】 記憶力や集中力を向上させたい方 脳を活性化させたい方 スキマ時間に手軽に脳トレしたい方 数字や計算が好きな方 自分の限界に挑戦したい方 さあ、あなたも「鬼計算」で脳の限界に挑戦してみませんか? 今すぐダウンロードして、毎日の脳トレ習慣を始めましょう!
Screenshots
Verdict
The clearest difference is price: Onikeisan at Free against AnsSheet's $1.99. Onikeisan also leads on update cadence (every 9 days vs every 4 months) and iOS requirement (12.0 vs 18.1). On 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
Onikeisan is free to download; AnsSheet costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
AnsSheet ships an update every 4 months, Onikeisan every 9 days. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | AnsSheet | Onikeisan |
|---|---|---|
| Price | $1.99 | Free — better |
| Positive reviews | 50.0% of reviews | — |
| Update frequency | Every 4 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Takashi Shinyashiki | iori kojima |
In-app purchases
AnsSheet
No in-app purchases
Onikeisan
No in-app purchases









