unitCalc vs Noise Meter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
unitCalc
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unitCalc 是一款適用於 iPhone 與 iPad 的計算機與台灣常用單位換算工具。 主要功能: • 四則運算、平方、立方、平方根、立方根及記憶功能 • 十萬至兆等大數快捷鍵 • 重量、長度、面積與貨幣換算 • 單位選項可橫向捲動,支援直向與橫向操作 • 匯率快取,可於離線時使用最後一次成功取得的資料 換算單位: • 重量:公克、公斤、台斤、台兩、英磅、盎司 • 長度:公尺、公分、台尺、台寸、英尺、英寸 • 面積:台坪、台畝、台分、台甲、平方公尺、公頃、平方英尺 • 貨幣:台幣、美元、日圓、歐元、英鎊、韓元、越南盾、港幣、人民幣 貨幣換算主要採用臺灣銀行對台幣現金賣出匯率;無現金匯率時使用即期賣出匯率。臺灣銀行服務無法使用時,App 會使用中央銀行官方資料計算參考匯率,並顯示來源與資料時間。 匯率資料僅供換算參考,不代表任何金融機構的實際交易報價;實際匯率應以交易時相關金融機構公告為準。unitCalc 為獨立開發工具,與臺灣銀行及中央銀行沒有隸屬、合作、代理或背書關係。
Noise Meter
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Measure the noise around you in real time. Noise Meter uses your device microphone to detect sound levels and displays them as a clear dB reading with a color-coded arc gauge. [Real-Time Sound Level] - Live arc gauge updates instantly as noise changes - Color codes: green (quiet), yellow (moderate), orange (loud), red (very loud) - Peak MAX reading with one-tap reset [Noise Reference Guide Built In] - Quiet: under 40 dB — library, empty room at night - Moderate: 40–60 dB — office, normal conversation - Loud: 60–80 dB — city traffic, busy restaurant - Very Loud: over 80 dB — concert, heavy machinery [Simple & Clean] - No sign-in, no setup — just tap Start - Works instantly, no configuration needed - Supports 9 languages: English, Korean, Japanese, Chinese (Simplified & Traditional), Spanish, French, German, and Portuguese Note: This app provides approximate sound level readings using your device microphone. Results may vary by device model and environment. Not a calibrated professional instrument. Download Noise Meter and know how loud your world really is.
Screenshots
Verdict
unitCalc and Noise Meter 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | unitCalc | Noise Meter |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 1 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | 培祐 黃 | pilyeong heo |
In-app purchases
unitCalc
No in-app purchases
Noise Meter
No in-app purchases









