Period vs timeAttackTodo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Period
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Want to know when everyone’s free? Need to schedule a meeting or practice during free periods? That’s where Comma comes in. Comma is a free scheduling app designed for university students. All you have to input is your available class periods—that’s it. See everyone’s free slots and plan your events smoothly. Comma also comes with smart features to make entering your availability fast and easy. ■ Features – Column Selection If you’re free all day, just tap once to select the entire day’s free periods. – Weekly Schedule Register your typical weekly free periods in advance and apply them with one tap. Input becomes even easier when you set your timetable. – Paste Feature If you have overlapping scheduling periods, you can paste availability from other events. ■ How to Use – For Organizers: Create an event, share the invitation link with your group, and enter your availability. – For Participants: Click the invite link, join the event, and enter your free periods. ■ Ideal For Club or team practice Group meetings Study sessions ...and many other group activities!
timeAttackTodo
This app gamifies your daily tasks by setting timers and challenging your past performance. Track your progress, aim for new personal bests, and build streaks to stay motivated. It supports multiple devices and offers a clean, accessible design.
- Time attack timer with countdown
- Personal best records and ranking system
- Daily achievement streaks
- Habit tracker with weekly scheduling
- Apple Watch integration
- Live Activity for dynamic display
- Dark and light mode options
- iCloud synchronization
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タイムアタック TODOは、日常のタスクにタイマーを設定し、過去の自分と競い合うゲーミフィケーションTODOアプリです。 【主な機能】 ■ タイムアタックタイマー 目標時間を設定してカウントダウン。リアルタイムでペースを確認しながらタスクに集中できます。 ■ 自己ベスト記録 & ランクシステム 毎回の実行タイムを記録。新記録を達成するとランクが上がります。ビギナーからグランドマスターまで5段階。 ■ 連続達成ストリーク 毎日タスクを完了して連続記録を更新。モチベーションを維持します。 ■ 習慣トラッカー 曜日ごとにタスクをスケジュール。ルーティンを習慣化できます。 ■ Apple Watch対応 手首からタイマーを操作。iPhoneとリアルタイム同期。 ■ ライブアクティビティ Dynamic Islandとロック画面でタイマーをリアルタイム表示。 ■ ダーク & ライトモード 設定からワンタップで切り替え。WCAG AAコントラスト準拠の読みやすいデザイン。 ■ iCloud同期 複数デバイス間でタスクデータを自動同期。
Screenshots
Verdict
The clearest difference is in-app purchases: timeAttackTodo at none against Period's 1. timeAttackTodo also leads on ads (none vs shown) and update cadence (every 5 days vs monthly). Period's advantage is iOS requirement (15.1 vs 17.0). On price 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. Period sells 1 one-off in-app purchase. timeAttackTodo asks for nothing beyond the download.
Period ships an update monthly, timeAttackTodo every 5 days. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.
| Parameter | Period | timeAttackTodo |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Monthly | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 45 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | TOMOKI KAMO | Masayuki Yamaji |
In-app purchases
Period
- プレミアムパス$2.99
timeAttackTodo
No in-app purchases









