Decibel Meter dB Sky vs 竖式计算器
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decibel Meter dB Sky
Measure ambient sound levels with a clear dial and record audio to understand sound changes. Save and replay moments, with advanced features available through a one-time purchase.
- Live sound-level estimates and curves
- Local audio recording and playback
- Screen-locked recording
- Photo sound cards
- Scene archives
- Timed recording stops
- Sound timeline and recap
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How loud is it around you? Keep the moment. Understand the changes. From a bedroom or office to a fan or air conditioner, follow sound changes on a clear dial, save a local recording and revisit the moments that matter. RECORD AND REPLAY FOR FREE • Live reference sound-level estimates, curves, minimum, maximum and average. • Local recording with pause, resume, playback and full history. • User-started recording continues with the screen locked or another app open. • Names, notes, tags, date filters and search. Location is optional. PRO: ONE PURCHASE. NO SUBSCRIPTION. • Photo sound cards: combine a photo, statistics and curve in a PNG. Preview before sharing. • Scene archives: collect observations of the same room, device or place. Filter by date and search. • Timed stop: choose a duration or end time, then start recording yourself. • Monitoring recap and sound timeline: find loud moments, threshold events and the longest low-noise interval. Locate and replay selected clips. • Before-and-after comparison: compare changes and the share of recording time above your chosen threshold. • Recording spectrum: explore relative frequency levels in saved audio and export spectrum CSV. • Share audio and clips; export PDF, CSV, recap images and multi-record reports. Remove ads and unlock advanced reminders. No registration. Recordings and records stay on your device. You decide what to share. The free version includes optional advertising services. Declining tracking does not affect basic recording. Readings are uncalibrated reference estimates affected by the device, microphone and environment. Not for professional, medical or legal evidence use. Photo cards are static images without playable audio. Advanced analysis, scene archives, timed stop and sharing/export require the Pro in-app purchase.
竖式计算器
This app offers a calculator-like interface for performing basic arithmetic operations. It supports decimal points and can detect repeating decimals, displaying the repetend. Results can be exported as images or PDFs and viewed with gesture zoom.
- Calculator-like interface
- Supports basic arithmetic operations
- Decimal point support
- Detects repeating decimals
- Gesture zoom for results
- Export results as image or PDF
- iPad Multitasking support
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- Easy to use (calculator-like interface). - Support addition, subtraction, multiplication and division operations. - Support decimal point. - Detect repeating decimal in division operation, and display repetend when the length of decimal part less than 30 digits. - The result page supports gesture zoom for easy viewing. - Support exporting result as image or PDF file. - Support iPad Multitasking - Support Physical Keyboard
Screenshots
Verdict
The clearest difference is price: Decibel Meter dB Sky at Free against 竖式计算器's $1.99. 竖式计算器's advantage is in-app purchases (none vs 1) and ads (none vs shown). On review sentiment 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
Decibel Meter dB Sky is free to download; 竖式计算器 costs $1.99 up front. Decibel Meter dB Sky sells 1 one-off in-app purchase. 竖式计算器 asks for nothing beyond the download.
Decibel Meter dB Sky ships an update every 21 months, 竖式计算器 every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Decibel Meter dB Sky | 竖式计算器 |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 21 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | 春豪 李 | 鹏 张 |
Customer experience
Decibel Meter dB Sky
竖式计算器
In-app purchases
Decibel Meter dB Sky
- Pro Lifetime Unlock$2.99
竖式计算器
No in-app purchases
