ホーム画面メモ vs Hz Lab
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ホーム画面メモ
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ホーム画面に貼れる付箋メモアプリ。 大事なことを忘れてしまう、そんな悩みを解決します。 ■ こんな方におすすめ ・買い物リストをよく忘れる ・やることを後回しにしてしまう ・メモしても見返すのを忘れる ・うっかり忘れが多い ■ 特徴 ・ホーム画面ウィジェットでいつでも目に入る ・アプリを開かなくてもメモが見える ・シンプルで使いやすいデザイン ・背景色・文字色をカスタマイズ可能 ■ 使い方 1. メモを入力 2. ホーム画面にウィジェットを追加 3. いつでも目に入る場所に配置 もうメモを忘れない。 Petariで「見える化」する新習慣を始めましょう。
Hz Lab
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Hz Lab puts mosquito tones, speaker water eject and a frequency generator into one simple tool. No ads. No subscription. The paid features are a single one-time purchase. MOSQUITO TONE Nine steps from 8,000Hz to 20,000Hz, playing the moment you tap. Every step is free. Each frequency comes with a rough guide to the age that usually still hears it, which makes it easy to compare with friends and family. HEARING CHECK Tones play from low to high and you answer "I hear it" or "I don't". You get a rough idea of where your hearing tops out. WATER EJECT For when water gets into the speaker. Pulsed low tones around 165Hz move the diaphragm far enough to help push droplets out. A countdown and waveform show you exactly how long is left. FREQUENCY GENERATOR Anything from 20Hz to 20,000Hz, by slider or by typing the number. The full range is free with a sine wave. SOLFEGGIO AND BINAURAL BEATS Solfeggio frequencies from 174Hz to 963Hz, plus binaural beats that play slightly different tones in each ear. HZ LAB PRO (one-time purchase) - Tune in 1Hz steps - Square, triangle and sawtooth waveforms - Strong and quiet water eject courses, with adjustable timing and range - Full control over binaural beats - All nine Solfeggio frequencies - Unlimited presets (the free version keeps three) - Sleep timer and background playback - Hearing check history and per-ear testing Pay once and keep it. Nothing auto-renews. WHAT WE TELL YOU UP FRONT - The iPhone's built-in speaker drops off sharply above about 16,000Hz. Use headphones for high frequencies. The app says the same thing. - Water eject does not guarantee that all water is removed, does not improve water resistance, and does not repair a water-damaged device. - The hearing check and age guidance are informational only, not a substitute for a medical hearing test. PROTECTING YOUR HEARING High tones rarely feel loud but still strain your ears. By default Hz Lab caps the volume above 15,000Hz and while headphones are connected (adjustable in Settings), and playback stops automatically if your headphones are unplugged. PRIVACY No account needed. No personal data is collected at all. No advertising or analytics SDKs. Presets and hearing check results stay on your device.
Screenshots
Verdict
The clearest difference is in-app purchases: ホーム画面メモ at none against Hz Lab's 1. ホーム画面メモ also leads on iOS requirement (15.1 vs 17.0). Hz Lab's advantage is update cadence (every 2 weeks vs every 3 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. Hz Lab sells 1 one-off in-app purchase. ホーム画面メモ asks for nothing beyond the download.
ホーム画面メモ ships an update every 3 months, Hz Lab every 2 weeks. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.
| Parameter | ホーム画面メモ | Hz Lab |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 33 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuki Hata | Daishi Sugawara |
In-app purchases
ホーム画面メモ
No in-app purchases
Hz Lab
- Hz Lab Pro$1.99









