# MyLoneWorkers M.A.R.S. vs Simple Voice Calculator

The clearest difference is in-app purchases: MyLoneWorkers M.A.R.S. at none against Simple Voice Calculator's 10. MyLoneWorkers M.A.R.S. also leads on iOS requirement (11.0 vs 17.0). Simple Voice Calculator's advantage is update cadence (every 2 months vs every 38 months). On price, ads and device support there is nothing between them.

Both are free to download. Simple Voice Calculator sells 10 in-app purchases, starting at $2.99 per month. MyLoneWorkers M.A.R.S. asks for nothing beyond the download.

MyLoneWorkers M.A.R.S. ships an update every 38 months, Simple Voice Calculator every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | MyLoneWorkers M.A.R.S. | Simple Voice Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (209 ratings)](https://appshunter.io/ios/app/simple-voice-calculator/id6448565084/reviews)** |
| Number of ratings | — | **209** |
| Positive reviews | — | 82.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 13 MB | 46 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [TERRACOM S. A.](https://appshunter.io/developer/627896499) | [Vito Software](https://appshunter.io/developer/1528233093) |

## What reviewers say

### MyLoneWorkers M.A.R.S.

[App page](https://appshunter.io/ios/app/myloneworkers-mars/id1242863303)

**In-app purchases:** none


### Simple Voice Calculator

[App page](https://appshunter.io/ios/app/simple-voice-calculator/id6448565084)

Perform calculations hands-free with voice input and instant spoken results. Easily edit equations, access history, and calculate from anywhere, including your Apple Watch. Offers offline AI voice calculation for everyday math needs.

**Highlights:** Hands-free voice input and output, Easy equation editing, Instant calculation results, Calculation history and favorites, Control Center and Lock Screen access, Apple Watch app with widgets

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $2.99 | per month |
| Voice Calculator Pro (Monthly) | $3.99 | per month |
| Pro (Yearly) - Discount | $29.99 | per year |
| Voice Calculator Pro (Yearly) | $29.99 | per year |
| Voice Calculator Pro (Yearly) | $39.99 | per year |
| Pro (Yearly) - Gold | $49.99 | per year |
| Support The Developer | $0.99 | one-time |
| Support The Developer | $4.99 | one-time |
| Support The Developer | $9.99 | one-time |
| 3 Months Voice Calculator Pro | $24.99 | one-time |


## Frequently asked questions

### Is MyLoneWorkers M.A.R.S. free?

MyLoneWorkers M.A.R.S. is free to download, with no in-app purchases.

### Is Simple Voice Calculator free?

Simple Voice Calculator is free to download, with in-app purchases available.

### Do MyLoneWorkers M.A.R.S. or Simple Voice Calculator have ads?

Neither MyLoneWorkers M.A.R.S. nor Simple Voice Calculator shows ads.

### Which is updated more often, MyLoneWorkers M.A.R.S. or Simple Voice Calculator?

MyLoneWorkers M.A.R.S. ships an update every 38 months, and Simple Voice Calculator every 2 months. Most recently, MyLoneWorkers M.A.R.S. was updated on November 2, 2026 and Simple Voice Calculator 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.*