# Coil Width Calculator vs LunaVoice SG

The clearest difference is iOS requirement: LunaVoice SG at 15.0 against Coil Width Calculator's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Coil Width Calculator ships an update every 2 days, LunaVoice SG every 3 days. The most recent releases landed on September 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Coil Width Calculator | LunaVoice SG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 days |
| Size | 10 MB | 33 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Rishabh Padia](https://appshunter.io/developer/1832510311) | [Oleksandr Eremenko](https://appshunter.io/developer/6775778818) |

## What reviewers say

### Coil Width Calculator

[App page](https://appshunter.io/ios/app/coil-width-calculator/id6749900909)

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

**In-app purchases:** none


### LunaVoice SG

[App page](https://appshunter.io/ios/app/lunavoice-sg/id6775778816)

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

**In-app purchases:** none


## Frequently asked questions

### Is Coil Width Calculator free?

Coil Width Calculator is free to download, with no in-app purchases.

### Is LunaVoice SG free?

LunaVoice SG is free to download, with no in-app purchases.

### Do Coil Width Calculator or LunaVoice SG have ads?

Neither Coil Width Calculator nor LunaVoice SG shows ads.

### Which is updated more often, Coil Width Calculator or LunaVoice SG?

Coil Width Calculator ships an update every 2 days, and LunaVoice SG every 3 days. Most recently, Coil Width Calculator was updated on September 6, 2026 and LunaVoice SG on October 25, 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.*