# Decibel Meter dB Sky vs 竖式计算器

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.

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.

## The numbers

| Metric | Decibel Meter dB Sky | 竖式计算器 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/decibel-meter-db-sky/id1451820892/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 21 months | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 11 MB | 66 MB |
| Requires iOS | 17.0 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [春豪 李](https://appshunter.io/developer/1451820891) | [鹏 张](https://appshunter.io/developer/1601107362) |

## What reviewers say

### Decibel Meter dB Sky

[App page](https://appshunter.io/ios/app/decibel-meter-db-sky/id1451820892)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime Unlock | $2.99 | one-time |


### 竖式计算器

[App page](https://appshunter.io/ios/app/vertical-calculator/id1601107360)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter dB Sky free?

Decibel Meter dB Sky is free to download, with in-app purchases available.

### Is 竖式计算器 free?

竖式计算器 costs $1.99, with no in-app purchases.

### Do Decibel Meter dB Sky or 竖式计算器 have ads?

Decibel Meter dB Sky shows ads; 竖式计算器 does not.

### Which is updated more often, Decibel Meter dB Sky or 竖式计算器?

Decibel Meter dB Sky ships an update every 21 months, and 竖式计算器 every 3 weeks. Most recently, Decibel Meter dB Sky was updated on November 2, 2026 and 竖式计算器 on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*