Comparison

Re vs Fluent

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

Head to head
About

Re

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“Re:Num7” Welcome to the app! This app challenges your working memory. [Magic Number 7±2] It is believed that we use temporary memory, or “working memory,” to remember information like numbers temporarily—especially when they have no particular meaning in sequence—such as when dialing a phone number from a handwritten note. Cognitive psychology suggests that, while individual differences exist, most people can handle chunks of information—essentially blocks of data—with a capacity of around 7, or 7±2 items. This is known as the “Magic Number 7±2.” This app will help you test the capacity of your working memory. See for yourself if this magic number holds true for you—whether your capacity is larger or smaller. How to play: Present a number with a specified number of digits, hide it, then have the user recall and input the number. If it matches, it's OK. Perform 10 sets of this task and observe the accuracy rate. A perfect game is achieved with all questions correct. Calculate a score based on the number of digits and accuracy rate, and compete with others. Scores can be recorded with a nickname and displayed in a ranking. This is expected to provide the following benefits: ・Gain an estimate of your working memory capacity ・Repeated practice may increase working memory capacity ・Similarly, it may help prevent or slow cognitive decline associated with aging ・Improves concentration, and above all, getting answers right is fun Features: ・Choose your preferred keypad layout for number input: phone layout, calculator layout, or (on iPad) horizontal row layout ・You can select the number of digits, generation method, and display method Digit Count: Each level offers three consecutive digit counts, plus a mode where these three counts are increased in three stages from shortest to longest Generation Method: Choose between a method that minimizes repetition (like drawing cards from a deck) or a completely random method Display Method: Options include showing all digits at once or displaying digits sequentially (step-up). A non-hidden method is also available, but the score will be 0 ・It is divided into four levels based on the range of digit counts. Beginner: Choose 5, 6, or 7 digits, or step-up from 5 to 7 digits. Most players should be able to clear this. Intermediate: Choose 7, 8, or 9 digits, or step-up from 7 to 9 digits. Clearable with effort. Advanced: 9, 10, 11 digits. You can choose step-up from 9 to 11 digits. With effort, some may be clearable. Extra: 11, 12, 13 digits. You can choose step-up from 11 to 13 digits. This likely exceeds human capability. Therefore, it is not locked. Aim to clear even a part of it with effort. ・A tutorial function is provided to make getting started easier. ・While primarily designed for individual play, you can register scores with a custom nickname upon game completion, allowing friendly competition with family or friends. ・We've prepared a mode that's easier to play, though your score will decrease. - Doubles the display time for challenge numbers (score halved) - Displays the C (Clear entry) key to re-enter input (using it reduces that challenge's score by 10%) The challenges themselves are simple and straightforward. However, actually attempting them reveals how difficulty skyrockets with increasing digit counts, offering a fascinating experience.

About

Fluent

Features
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Fluent は、シャドーイングと AI の先生で、英語の「聞く・話す」を毎日少しずつ伸ばす学習アプリです。お手本に声を重ねて録音すると、AI が発音・リズム・抑揚を採点。5 分の AI クラスや総合テストで、自分に合った練習を続けられます。 ■ シャドーイング + AI 採点 ・多国籍アクセントのプリセット教材(アメリカ・イギリス・オーストラリア・インド・シンガポール など) ・再生位置のハイライト、0.5× からの速度調整、くり返し再生 ・録音してそのまま AI 分析。単語ごとの評価と総合スコア、次に直す一点のコメント ・画面をロックしても再生が続きます ■ AI クラス(5 分のマンツーマン) ・AI の先生と声で話す 5 分のレッスン ・TOEIC・TOEFL 形式のリーディング、リスニング、ライティング、スピーキング、英単語 4 択 ・1 問ごとに正誤とひとことの解説。正解が続くと少し難しく、つまずくと少しやさしく ・会話レベルチェック ■ 総合テスト ・語彙、文法、リーディング、リスニング、ライティング、スピーキングから、今のレベルを 9 段階(A1〜C2)で推定します(学習の目安で、公式の認定ではありません) ■ AI コーチ(Premium) ・目標と使える時間から 2 週間の学習計画を一緒に作成 ・音声での面談と振り返り。話した内容は面談記録として見返せます ■ 単語帳 ・練習画面で単語をタップして保存。文脈に合った意味と例文つき ■ Web 版との連携 同じアカウントで Web 版(fluent-en.com)にログインすると、教材と学習記録が同期されます。手持ちの音声から教材を作る機能は Web 版で使えます。 ■ 料金 7 日間の無料トライアル(AI クラス 3 回、音声コーチング 15 分まで)のあと、続けて使うには有料プランが必要です。アプリ内では自動更新サブスクリプションで購入できます。 ・Starter:AI クラス 5 分 × 月 4 回 ・Pro:AI クラス 5 分 × 毎日 1 回 ・Pro Plus:AI クラス 5 分 or 10 分 × 毎日 1 回 ・Premium:Pro Plus の内容 + AI コーチ それぞれ月額と年額があります。料金はアプリ内で、お住まいの地域の通貨で表示されます。 購入すると Apple ID に課金されます。サブスクリプションは、現在の期間が終わる 24 時間前までに解約しない限り自動で更新されます。更新や解約は iPhone の「設定」> Apple ID >「サブスクリプション」から行えます。 利用規約:https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Fluent 利用規約:https://fluent-en.com/terms プライバシーポリシー:https://fluent-en.com/privacy ■ 必要な権限 マイク:シャドーイングの録音と、AI クラス・AI コーチとの会話に使います。録音はあなたのアカウントにのみ保存されます。AI との会話の音声はリアルタイムに処理され、保存しません(文字起こしのみ保存)。

Screenshots

Re4 screens
Fluent4 screens

Verdict

The call

The clearest difference is ads: Fluent at none against Re's shown. Fluent also leads on update cadence (daily vs every 2 months). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Re ships an update every 2 months, Fluent daily. The most recent releases landed on October 28, 2026 and November 1, 2026 respectively.

Scorecard2 real differences · 4 level
Re versus Fluent: the parameters behind the verdict, then further details
ParameterReFluent
PriceFreeFree
Update frequencyEvery 2 monthsDaily — better
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPad — betteriPhone
Requires iOS17.616.4 — better
Further details — not scored
Size12 MB85 MB
Age rating12+4+
Developer有限会社知識情報研究所tetsuya takayanagi

In-app purchases

None

Re

No in-app purchases

None

Fluent

No in-app purchases

Questions

Is Re free?
Re is free to download, with no in-app purchases.
Is Fluent free?
Fluent is free to download, with no in-app purchases.
Do Re or Fluent have ads?
Re shows ads; Fluent does not.
Which is updated more often, Re or Fluent?
Re ships an update every 2 months, and Fluent daily. Most recently, Re was updated on October 28, 2026 and Fluent on November 1, 2026.

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