# Calctan vs 音随补光灯

The clearest difference is price: Calctan at Free against 音随补光灯's $1.99. 音随补光灯's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Calctan is free to download; 音随补光灯 costs $1.99 up front. Calctan sells 1 one-off in-app purchase. 音随补光灯 asks for nothing beyond the download.

Calctan ships an update every 3 months, 音随补光灯 monthly. The most recent releases landed on October 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Calctan | 音随补光灯 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.5 (61 ratings)](https://appshunter.io/ios/app/calctan/id1445480535/reviews)** | — |
| Number of ratings | **61** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 1 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Lozada](https://appshunter.io/developer/421852863) | [文皓 郭](https://appshunter.io/developer/1501843117) |

## What reviewers say

### Calctan

[App page](https://appshunter.io/ios/app/calctan/id1445480535)

This sophisticated calculator app offers a minimalist design with advanced mathematical functions and extensive personalization options. It seamlessly syncs across devices and includes multitasking features for enhanced productivity.

**Highlights:** Intuitive minimalist design, 100+ customizable themes, 47 advanced mathematical functions, Automatic calculation history, iCloud sync across devices, Split Screen and Swipe Mode multitasking, Share calculations easily

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $9.99 | one-time |


### 音随补光灯

[App page](https://appshunter.io/ios/app/music-flash/id6742900823)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calctan free?

Calctan is free to download, with in-app purchases available.

### Is 音随补光灯 free?

音随补光灯 costs $1.99, with no in-app purchases.

### Do Calctan or 音随补光灯 have ads?

Calctan shows ads; 音随补光灯 does not.

### Which is updated more often, Calctan or 音随补光灯?

Calctan ships an update every 3 months, and 音随补光灯 monthly. Most recently, Calctan was updated on October 24, 2026 and 音随补光灯 on September 10, 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.*