Low Frequency Detector vs ずっと二人で
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Low Frequency Detector
This tool measures and analyzes low-frequency sounds that are difficult for the human ear to detect. It helps identify potential noise pollution from sources like construction or factories, providing detailed reports on frequency components and sound levels.
- Low-frequency power level measurement (<100Hz)
- Audible band power level measurement (Leq)
- 1/3 octave band analysis (OCT)
- FFT analysis (FFT)
- Time course graph (TIME)
- Measurement report generation
- Calibration function
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"Low Frequency Detector" is an acoustic measurement tool for detecting low-frequency sounds that is hard to hear in normal situation. The human ear is not sensitive enough to low-frequency sounds. If you are exposed to noise from nearby construction or factories without realizing it, you may feel discomfort or a sense of pressure. In such cases, you can use this app to check what kind of low-frequency noise is present. Generally, low-frequency sounds is a sound wave ranging from 1Hz to 100Hz. Depending on its frequency component and sound level, the degree of influence on the human body and the noise sensation is different. This app allows you to examine the frequency component of low-frequency sounds by 1/3 octave band analysis and FFT analysis. Features: - Low-frequency power level measurement less than 100Hz (LF Level): Flat characteristic, Updating indication of measurement period 1 sec. - Power level measurement in the audible band (Leq): Flat characteristic, Updating indication of measurement period 200ms. - 1/3 octave band analysis (OCT) - FFT analysis (FFT) - Time course graph (TIME) - Snapshot (Snap) on the measurement display screen. - Report function (Report): Analysis report of a peak LF Level with TIME, OCT and FFT. - Measurement time: up to 60 sec Functions: The measurement analysis is performed in the following step. Be sure to set the measurement conditions in Step-1 once before starting the sound measurement. 1) Calibration (Calibrate): The reference signal (1kHz sine wave) is output to determine the reference noise level for the low-frequency component. If the volume level of iPhone is set to about 20-50%, the calibration will automatically adjust it to the optimum volume level for the reference signal. 2) Measurement (Measure): Analyze a power level of low-frequency sounds. - LF Level (dB): Low-frequency power level less than 100Hz. - Leq (dB): Sound power level with the frequency weight characteristic Z (Flat) of the audible band. 3) Measurement display: It can select either 1/3 octave band frequency analysis, FFT analysis or Time course graph. They are updated in real time. 4) Report: Measurement result report. It is effective when measuring for 10 seconds or more. # Time course graph: TIME - Low-frequency (LF) Level (dB): Time course graph with peak level noise level judgment (RED-very noisy, YELLOW-noisy, GREEN-normal) at the peak level. - LF max (dB): maximum dB value of low frequency. # Frequency response graph: OCT, FFT - OCT Band LF max (dB): maximum dB value in 1/3 octave band at LF max observation. - Max Level Frequency (Hz): peak frequency at LF max observation. Notes: - The sound measurement of the low-frequency range is a level difference with respect to the reference signal, which indicates the relative power level. - The reference signal is output during calibration and sound level measurement. - Do not change the volume level of iPhone after the calibration. - White line in the OCT and FFT modes indicates frequency characteristics in frequency weight correction of G characteristics. - Since iPhone's built-in microphone has a lower sensitivity on the very low frequency range, it is not recommended to measure a huge volume sound near a very loud noise source. - Since it takes a while for the observation value to stabilize immediately after the start of measurement, the maximum value is calculated from about 2 seconds later. - In the case high power of 1kHz component is included in the measured noise source, the precision of measured value by this app largely decreases. - Sudden noise or impulsive sounds are not low frequency noises in general. - The previous calibration information can be maintained internally. - The analysis results may vary due to individual differences in iPhone devices. - The authorization to access built-in microphone and Photos will be confirmed by iOS system at first access. Please visit our iOS app support page for more information.
ずっと二人で
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「ずっと二人で -いつもいっしょに-」はあなたの大切な人と二人だけの間で使うプチSNSアプリです。 主な機能は以下の三つです。 ・チャット ・現在地の確認 ・思い出ルーム それぞれの機能はあなたがパートナーとして承認した相手ひとりとだけ共有されます。 機能は多くありません、シンプルなミニアプリでございます。 基本的には彼氏・彼女など恋愛関係の間で使うことを想定しておりますが、もちろんそれ以外のあなたの大切な人との間で使用することもできます。 ※このアプリはランダムに恋人やパートナーを探すタイプのアプリではありません。予めいっしょにアプリを使う予定の相手と共に始めるのが好ましいです。 ■はじめかた まずはパートナーを見つけなくてはいけません。 アカウント作成にユーザーIDを決めますので、それを相手に教えてもらって下さい。 ユーザーIDで検索して相手が見つかったらリクエストを送ります。 リクエストを受け取った側は、相手をパートナーとして受け入れる場合はそのリクエストを承認して下さい。 ■パートナーができてから ◎チャットができるようになります。 チャットはトピックごとに分けることができ、所々でトピックを新しくすることで、要件ごとに整理がしやすく、過去のメッセージなども見やすくなります。 ◎パートナーと共有する思い出ルームができます。 各画像と文章で思い出を残しておくことができます。 また未来の思い出(予定)を入れておくこともできます。 各思い出は作成した側だけが削除することができます。 ◎地図上でお互いの位置を確認することができます。 ※位置情報の機能はスマホ本体のプライバシー設定や通信状況によって変わります。 ページを開くとお互いのアイコンが地図上に表示されます。 基本的にはページを開いたときに自分の現在地が更新されます。 ですので、相手が位置情報のページを開くと相手の情報も更新されることになります。更新された位置情報はお互いに確認することができます。 ※位置情報サービスが「常に許可」になっている場合は、バックグラウンドでも位置情報が更新されます。(バックグラウンドからもアプリを閉じると更新は止まります。) ただし更新されるのは移動したときのみで、同じ場所にいる場合は更新されません。 ※位置情報はおよその位置を確認するためのものであり、正確な位置を把握するためのものではございません。 位置情報サービスを「常に許可」にしている場合はプライバシーや電池の消耗がはやくなる可能性がありますので、設定はしっかり確認してご使用ください。
Screenshots
Verdict
The clearest difference is price: ずっと二人で at Free against Low Frequency Detector's $9.99. ずっと二人で also leads on iOS requirement (10.3 vs 26.2). Low Frequency Detector's advantage is in-app purchases (none vs 2).
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
ずっと二人で is free to download; Low Frequency Detector costs $9.99 up front. ずっと二人で sells 2 one-off in-app purchases. Low Frequency Detector asks for nothing beyond the download.
| Parameter | Low Frequency Detector | ずっと二人で |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 2.8 (6 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 9 months | — |
| Ads | No | — |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone — better | — |
| Requires iOS | 26.2 | 10.3 — better |
| Further details — not scored | ||
| Size | 1 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | TOON,LLC | SHINGO MATSUO |
In-app purchases
Low Frequency Detector
No in-app purchases
ずっと二人で
- アプリ内の広告削除$1.99
- 開発者を支援$1.99
Questions
Is Low Frequency Detector free?
Is ずっと二人で free?
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