QuietAlert vs Plen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuietAlert
This utility app notifies you of timer completion using LED flashes and vibration, ideal for quiet environments like libraries or trains. It offers customizable vibration frequencies and optional sound alerts, even playing through headphones.
- LED flash and vibration alerts
- Customizable vibration frequency
- Background operation
- Optional beep on completion
- Headphone-only sound output
- Custom alarm sound support
- Widget alarm stop
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"QuietAlert" tells the end of timer LED Flash and vibration. Using the "QuietAlert", such as libraries and train in unmentionable sounds quieter and where noise is audible, even terminate the timer can with vibration and LED flashes. (models without the vibrator, iPod Touch and iPad will sound. ) Mode button long press then vibration frequency (1-9) can be set. "QuietAlert" works in the background. You needn't start the app at all times. However, you must have set a LED Flash app to front. When your app to front screen, falling into place. You can reduce power consumption to turn off screen in doing so. As an option provides the following features. -Beep on completion of a timer. -Play a sound from the headphones only. -You can use alarm sound file yourself. -You can stop the alarm from the widget. Give it a try. Poor English, I'm sorry.
Plen
Track aircraft in real-time with live location updates. See planes as they fly and monitor weather conditions along their routes. Discover various types of aircraft with this intuitive radar tool.
- Real-time ADS-B tracking
- Live aircraft location updates
- Weather updates for flight paths
- Discover different types of aircraft
- Intuitive radar interface
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Meet Plen. Plens are in the sky all around us. Track plens with Plen, find plens, see plens. All with Plen. Find fun plens, fast plens, slow plens. Plen. Key Features: Real-Time ADS-B Tracking: Plen location updated in real time. Weather Updates: Watch plens fly through sky poofs. Download Plen.
Screenshots
Verdict
The clearest difference is review sentiment: Plen at 100% against QuietAlert's 44%. Plen also leads on in-app purchases (none vs 3) and update cadence (every 6 days vs every 12 months). 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. QuietAlert sells 3 one-off in-app purchases. Plen asks for nothing beyond the download.
QuietAlert ships an update every 12 months, Plen every 6 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | QuietAlert | Plen |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (16 ratings) — better | — |
| Positive reviews | 43.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 16 — better | — |
| Update frequency | Every 12 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 203 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasushi Sakai | Automata Solutions Ltd. |
Customer experience
QuietAlert
Plen
In-app purchases
QuietAlert
- Sound Option$1.99
- Alarm Option$1.99
- Widget Option$1.99
Plen
No in-app purchases
