音耳せん vs Big Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
音耳せん
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Sound earplugs is an application that uses acoustic psychological effects (masking effects) instead of the noise canceller function to reduce ambient sounds that are of concern. Effective when you can't concentrate on your work, study, programming, etc. due to "too quiet and uncomfortable" "I can't help but worry about ambient sounds" "I'm worried about a specific noise or the next conversation" there is. However, whether or not the sound earplugs work well depends on the usage environment and individual differences. Please refrain from using if you are concerned about the playback sound of the app. The specific sound to play can be selected from "radio noise", "forest rain sound", "cafe sound", "night sea", "early morning", "library", "moonlight", and "wind chime". The playback time of the timer can be specified from "3 minutes, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 1 hour", and the time until the end of playback can be confirmed with the countdown timer on the screen. I will. Use the volume buttons on the main unit to adjust the volume level. This app works with the speaker of the main body, but the effect is more clear with stereo earphones and stereo headphones. Also, pay attention to the volume level so that you do not damage your ears with loud noise.
Big Timer
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A simple countdown timer that's big, clear, and easy to use. KEY FEATURES • Repeat: Restart the same timer when the countdown ends • History: Quickly restart one of your recently used timers • Alarms: Set the alarm sound, volume, and duration • Themes: Choose between Light and Dark The free version includes banner ads. Watch a video ad to hide them for 15 minutes. PRO FEATURES Unlock Pro with a one-time purchase to get: • An ad-free experience • Custom themes: Choose your text color, background color, and font • More alarm options: Get additional alarm sounds and choose a timer completion sound from your device's music library Pro is a one-time purchase, not a subscription. Note: Completion sounds selected from your music library play only while the app is visible on screen. When the app is in the background, the completion notification uses the notification sound instead.
Screenshots
Verdict
The clearest difference is in-app purchases: 音耳せん at none against Big Timer's 1. 音耳せん also leads on iOS requirement (13.0 vs 18.6). Big Timer's advantage is update cadence (every 6 days vs every 5 weeks). On price, 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. Big Timer sells 1 one-off in-app purchase. 音耳せん asks for nothing beyond the download.
音耳せん ships an update every 5 weeks, Big Timer every 6 days. The most recent releases landed on September 27, 2026 and September 21, 2026 respectively.
| Parameter | 音耳せん | Big Timer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | Every 6 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 29 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | koji kamogawa | Tsukutena |
In-app purchases
音耳せん
No in-app purchases
Big Timer
- Pro Upgrade$3.99









