Comparison

Just Timer vs スマートタイマーAI

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

Head to head
About

Just Timer

Features
Read full description

Everyday routines, work, study, and exercise. By being mindful of time in every situation, productivity can change dramatically. Just Timer is a simple and elegant timer app designed with speed and ease of use as the top priorities. Only the essential features are included, making it intuitive and effortless for anyone to use. You can manage multiple timers at the same time, which is perfect for cooking with parallel tasks or using the Pomodoro Technique to switch between work and breaks. Timers start instantly with a single tap, and you can adjust the time flexibly even while a timer is running. A stopwatch mode is also included for measuring elapsed time when needed. Just Timer runs reliably in the background and notifies you when a timer finishes. Without unnecessary decoration or complicated settings, Just Timer helps you focus on what matters right now. Main Features Manage multiple timers simultaneously Start timers with a single tap Adjust time during countdown with +1 minute / +5 minutes Timer and stopwatch modes Pin frequently used timers to the top Edit or delete timers with swipe gestures Quickly find timers using filters Background operation with notifications Recommended For Anyone looking for a simple and responsive timer Those who want to stay focused using the Pomodoro Technique Users who need to manage multiple timers while cooking or working People tracking workout or exercise intervals Anyone who prefers a clean app without unnecessary features

About

スマートタイマーAI

Features
Read full description

おすすめ開始、集中ルーチン、自動分析まで端末内で完結するフォーカスタイマーです。 Smart Timer AI は、iPhone標準タイマーの軽さはそのままに、継続しやすさと達成感を強化しました。勉強、仕事、家事、運動、休憩など、その時の目的に合うタイマーをすぐ始められます。 【主な機能】 ■ スマートおすすめ開始 時間帯とアプリ内の履歴をもとに、その場に合うプリセットを提案します。外部送信はなく、分析は端末内だけで完結します。 ■ ワンタッププリセット 集中、勉強、作業、運動、休憩、仮眠など、よく使う時間設定をワンタップで開始できます。 ■ カスタムプリセット保存 今の時間設定を名前付きで保存し、自分専用のタイマーとして何度でも呼び出せます。 ■ ルーチン自動進行 ポモドーロや深い集中ルーチンを1フェーズずつ自動でつなぎ、集中と休憩の切り替えをサポートします。 ■ 集中分析ダッシュボード 今日の達成率、連続達成日数、完走率、直近7日の積み上げを見える化。毎日の継続を後押しします。 ■ カウントダウンタイマー & ストップウォッチ 基本機能も高速で使いやすく、通知・音・テーマカラーも自由に変更できます。 【このアプリの強み】 ・起動してすぐ使える軽さ ・おすすめ、履歴、分析まで完全ローカル ・アカウント登録なし、広告なし ・標準タイマーより便利で、多機能すぎない 集中を始めるハードルを下げ、続ける理由まで作る。そんな毎日使えるタイマーアプリです。

Screenshots

Just Timer4 screens
スマートタイマーAI4 screens

Verdict

The call

The clearest difference is ads: スマートタイマーAI at none against Just Timer's shown. スマートタイマーAI also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). Just Timer's advantage is update cadence (daily vs every 6 weeks). On price and in-app purchases 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

Just Timer ships an update daily, スマートタイマーAI every 6 weeks. The most recent releases landed on September 28, 2026 and September 18, 2026 respectively.

Scorecard4 real differences · 2 level
Just Timer versus スマートタイマーAI: the parameters behind the verdict, then further details
ParameterJust TimerスマートタイマーAI
PriceFreeFree
Update frequencyDaily — betterEvery 6 weeks
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size5 MB32 MB
Age rating4+4+
DeveloperBYNETYuya Fujita

In-app purchases

None

Just Timer

No in-app purchases

None

スマートタイマーAI

No in-app purchases

Questions

Is Just Timer free?
Just Timer is free to download, with no in-app purchases.
Is スマートタイマーAI free?
スマートタイマーAI is free to download, with no in-app purchases.
Do Just Timer or スマートタイマーAI have ads?
Just Timer shows ads; スマートタイマーAI does not.
Which is updated more often, Just Timer or スマートタイマーAI?
Just Timer ships an update daily, and スマートタイマーAI every 6 weeks. Most recently, Just Timer was updated on September 28, 2026 and スマートタイマーAI on September 18, 2026.

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