Noise Diary vs 騒音メモ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Noise Diary
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Noise Diary is a focused tool for measuring environmental sound and saving the moment as a noise event. What you can do: - See an approximate dB(A) reading - Start and end an event to save Leq, maximum, and minimum - Add a tag and notes - Review a local timeline - Export CSV and PDF - Apply local calibration using a reference sound level meter - Continue only an event you started while the screen is locked or another app is open Privacy first: - Analysis runs on your device - No audio recording is created - Audio and measurements are not uploaded - No background measurement outside an event you start Important: Readings are approximate values calculated from the iPhone microphone. Noise Diary is not an IEC-compliant professional sound level meter. Do not use it for legal, health, hearing-safety, or workplace-compliance decisions.
騒音メモ
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騒音メモは、気になった音を10秒で測定し、日時・種類・任意メモとともに端末内へ保存するiPhoneアプリです。必要な場合だけ、測定前に録音をオンにして10秒音声も保存できます。 【主な機能】 ・10秒測定で平均・最大の相対音量レベルを記録 ・足音、話し声、音楽、工事、その他に分類 ・500文字までの任意メモ ・必要な測定だけ端末内へ音声保存 ・録音の再生、録音だけの削除、記録との同時削除 ・全件数、22時〜6時の深夜比率、24時間分布を集計 ・相談時に共有しやすいA4 PDFとCSVを作成 ・指定した時間帯と閾値で見守り 無料で20件まで記録できます。買い切り¥600で記録数の上限解除、PDF・CSV、見守り機能を利用できます。 【プライバシー】 録音は初期状態でオフです。記録と録音は端末内だけに保存され、開発者のサーバーへ送信されません。位置情報、アカウント、広告、外部分析SDKは使用しません。 【ご注意】 表示値は未校正のiPhoneマイクによる相対的な目安です。校正済み騒音計の値や法的な測定値としては使用できません。
Screenshots
Verdict
Noise Diary and 騒音メモ are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Noise Diary sells 1 one-off in-app purchase and 騒音メモ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Noise Diary | 騒音メモ |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | 逸文 周 | kenzo sawada |
In-app purchases
Noise Diary
- Noise Diary Pro Lifetime$6.99
騒音メモ
- 騒音メモ フル機能$3.99








