Comparison

J PREP Friends vs Terakoya

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

Head to head

日本の学習者を繋ぐ

About

J PREP Friends

This educational app allows students to review and prepare for lessons at home. It is designed to supplement classroom learning for J PREP Kids students.

Highlights

Lesson review
Lesson preparation
Home study tool
For J PREP Kids students

Features

Read full description

このアプリは、J PREP Kidsの生徒が自宅で授業の予習復習をするために使用する学習アプリです。

About

Terakoya

Features

Read full description

勉強を、もっと楽しく。もっと続く。このアプリは、日々の学びをシェアし、仲間と励まし合いながら学習を継続できる、新しいスタイルの学習コミュニティアプリです。 ◆ 主な機能投稿機能：今日の勉強内容や気づきをシェアマップ連携：近くの学習仲間を見つけてつながれるチャット：勉強の悩みやおすすめ教材を気軽に相談グループ機能：同じ目標を持つ仲間とチームで学習プロフィール管理：所属や専門分野で信頼性アップ ◆ こんな方におすすめ一人での学習にモチベーションが続かない方同じ分野を学んでいる仲間とつながりたい方勉強の成果を記録し、見返したい方あなたの学びを、仲間とともに。さあ、今日の学習を記録してみましょう！

Screenshots

J PREP Friends4 screens

Terakoya4 screens

Verdict

The call

The clearest difference is update cadence: Terakoya at every 9 days against J PREP Friends's monthly. On price, 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

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

J PREP Friends ships an update monthly, Terakoya every 9 days. The most recent releases landed on November 7, 2026 and October 28, 2026 respectively.

Scorecard1 real difference · 7 level

J PREP Friends versus Terakoya: the parameters behind the verdict, then further details
Parameter	J PREP Friends	Terakoya
Price	Free	Free
Positive reviews	25.0% of reviews	—
Update frequency	Monthly	Every 9 days — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	15.5	15.1 — better
Further details — not scored
Size	236 MB	75 MB
Age rating	4+	17+
Developer	J PREP INC.	株式会社 Terakoya.AI

In-app purchases

None

J PREP Friends

No in-app purchases

None

Terakoya

No in-app purchases

Questions

Is J PREP Friends free?

J PREP Friends is free to download, with no in-app purchases.

Is Terakoya free?

Terakoya is free to download, with no in-app purchases.

Do J PREP Friends or Terakoya have ads?

Neither J PREP Friends nor Terakoya shows ads.

Which is updated more often, J PREP Friends or Terakoya?

J PREP Friends ships an update monthly, and Terakoya every 9 days. Most recently, J PREP Friends was updated on November 7, 2026 and Terakoya on October 28, 2026.