Mom's Timer vs 音耳せん
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mom's Timer
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Kids, particularly those with autism, find it troublesome to keep track of time and end up taking a lot of time even for simple tasks. If you are a parent of an autistic kid, you know how much time is wasted while waiting for him to finish what he/she is doing. Mom's Timer is designed to help motivate autistic kids to finish what they are doing. Simply set the duration, and also a photo of any reward that the child will get if he finishes in time. The timer will start hiding the photo gradually, giving the child an idea of the remaining time and the consequences of dilly-dallying. We made Mom's Timer to help a child who had trouble finishing tasks, and found it very helpful. We now share it with you for free, and hope it will help many more kids!
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.
Screenshots
Verdict
The clearest difference is ads: Mom's Timer at none against 音耳せん's shown. 音耳せん's advantage is update cadence (every 5 weeks vs every 37 months) and iOS requirement (13.0 vs 15.6). 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.
Mom's Timer ships an update every 37 months, 音耳せん every 5 weeks. Both last shipped on November 11, 2026.
| Parameter | Mom's Timer | 音耳せん |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 37 months | Every 5 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | YUBI | koji kamogawa |
In-app purchases
Mom's Timer
No in-app purchases
音耳せん
No in-app purchases









