StudyArena vs NAGI Step
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StudyArena
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ストップウォッチで勉強時間を測って、友達と競いモチベーションを高めるのを目的として作ったアプリです。
NAGI Step
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NAGI Step is a quiet focus app for planning what matters today, running the session, and reviewing what you finished. Where available, AI support helps turn a goal into projects, tasks, descriptions, and focus-sized steps. [Main Features] - Focus sessions: plan and run focus/break flows. - AI support (where available): create projects and tasks from a goal, draft descriptions, and split work into manageable steps. - Tasks & projects: assign tasks to sessions and keep today’s work clear. - Stats & history: daily focus totals, monthly calendar, and session records. - Memos: capture ideas during sessions and search them later. - Music Player: import local audio files and play a playlist during focus. - Notifications: local alerts for timer phase changes. [Free Plan] - Up to 2 projects. - Daily totals and monthly calendar. - Music Player. [Plus Unlocks] - Remove ads. - Create 3+ projects. - Hour-by-hour detailed stats and session list. [Best For] - Studying, deep work, and quiet task execution. - Users who want tasks, timer, memos, and history in one app. - Users who want AI-assisted planning where available. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: StudyArena at none against NAGI Step's 4. NAGI Step's advantage is iOS requirement (15.0 vs 18.5). On price, update cadence, 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. NAGI Step sells 4 in-app purchases, starting at $2.99 per month. StudyArena asks for nothing beyond the download.
StudyArena ships an update monthly, NAGI Step every 3 weeks. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.
| Parameter | StudyArena | NAGI Step |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 117 MB |
| Age rating | 12+ | 4+ |
| Developer | Yasuhiro Ogawa | Yuma Isshiki |
In-app purchases
StudyArena
No in-app purchases
NAGI Step
- NAGI Timer Plus Monthly$2.991 Month
- NAGI Timer Plus Yearly$19.991 Year
- 30 AI Credits$1.99
- 100 AI Credits$4.99
