dB Meter Pro vs 30minTimer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
dB Meter Pro
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【こだわりのポイント】 オーディオコンポ・スタイル: 往年のオーディオ機器のような、セグメント表示のインジケーターと美しいグロー効果(発光)を再現しました。 深夜の住宅街やカフェなど、周囲の騒音レベルが気になる時に。 開発者メッセージ 個人開発者として、機能性はもちろん「使っていて心地よいデザイン」に徹底的にこだわりました。かつてのオーディオ・コンポが持っていた、あのワクワクするメカニカルな質感を、あなたのiPhoneでぜひ体感してください。
30minTimer
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Ever look up and realize three hours vanished into one task? This app fixes that with a simple chime. Your iPhone chimes at the minutes you choose, like :00 and :30 every hour, so you can feel time passing without checking the clock. Chimes arrive as notifications, even when the app is closed. ■ Great for • Remote work: break the day into half-hour blocks • Study: focus for 50 minutes, rest when it chimes • Healthy habits: a sip of water and a stretch at every chime • Kids' routines: when the "Oh!" plays, it's time for the next thing ■ Pick your hours • Tap the hours you want, from 0 to 23 • "9–18" and "All hours" in one tap. Quiet at night ■ Up to two chimes an hour • Spin two wheels to pick the minutes • :00 and :30, :15 and :45, or just :50. Your call ■ 7 sounds, even a voice • Chime, Warning, and three Confirm tones • Male and female "Oh!" voices • Give each wheel its own sound: a chime on the hour and an "Oh!" at half past • Tap a name to preview ■ Three simple steps 1. Pick your hours and minutes 2. Tap the big "Apply" button at the bottom 3. It chimes automatically, every day Send a test notification to hear it in 10 seconds. ■ Free, with minimal ads • Ads never interrupt your chimes • Your first "Apply" is ad-free • Later changes are saved after a short video ad • Turning notifications on/off and "Clear all" are always instant and ad-free ■ Privacy • Your settings stay on your iPhone • Chimes are local notifications scheduled on your iPhone. No developer server is involved Available in English, Japanese, and Traditional Chinese. Note: in Silent mode or a Focus, sounds may not play, following your iPhone settings.
Screenshots
Verdict
The clearest difference is ads: dB Meter Pro at none against 30minTimer's shown. 30minTimer's advantage is update cadence (every 10 days vs every 3 weeks) and iOS requirement (18.5 vs 26.5). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
dB Meter Pro ships an update every 3 weeks, 30minTimer every 10 days. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.
| Parameter | dB Meter Pro | 30minTimer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.5 | 18.5 — better |
| Further details — not scored | ||
| Size | 8 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Kouki Yoshimoto | hidenobu akiyoshi |
In-app purchases
dB Meter Pro
No in-app purchases
30minTimer
No in-app purchases









