# Calculator Pro vs Voicena

The clearest difference is rating: Calculator Pro at 4.4 against Voicena's 3.6. Calculator Pro also leads on ratings volume (62 vs 5). Voicena's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Calculator Pro sells 2 in-app purchases, starting at $4.99 per 7 days and Voicena sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Calculator Pro holds the better App Store score, 4.4 against 3.6. That said, the two scores are not equally well evidenced: Calculator Pro has 62 ratings behind it against 5, so its average is the more settled of the two.

Calculator Pro ships an update every 2 weeks, Voicena every 3 weeks. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Calculator Pro | Voicena |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (62 ratings)](https://appshunter.io/ios/app/calculator-pro-smart-tools/id6751831649/reviews)** | [3.6 (5 ratings)](https://appshunter.io/ios/app/voicena-reverse-singing-app/id6756212809/reviews) |
| Number of ratings | **62** | 5 |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 28 MB | 78 MB |
| Requires iOS | 18.5 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [嘉晨 王](https://appshunter.io/developer/1780248506) | [Quynh Hoang](https://appshunter.io/developer/1673099833) |

## What reviewers say

### Calculator Pro

[App page](https://appshunter.io/ios/app/calculator-pro-smart-tools/id6751831649)

This app consolidates essential calculation tools into a user-friendly interface. It offers basic and scientific calculations, currency and unit conversions, loan and discount tools, and a date calculator. Customize themes and settings for a personalized experience.

**Highlights:** Basic and scientific calculations, Currency and unit converters, Loan, discount, and tip calculators, Date and BMI calculators, Calculation history, Customizable themes and settings

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smart Calculator Week | $4.99 | per 7 days |
| Smart Calculator NoAds Lift-Time | $12.99 | one-time |


### Voicena

[App page](https://appshunter.io/ios/app/voicena-reverse-singing-app/id6756212809)

Record your voice, then reverse it to create humorous and surprising audio clips. Challenge friends to guess backward lyrics or sing them correctly, perfect for social media and viral content.

**Highlights:** Record singing, Reverse audio instantly, Compare reversed and original voice, Challenge friends, Create viral content, Train hearing and voice

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly | $9.99 | per month |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is Calculator Pro free?

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

### Is Voicena free?

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

### Which has better reviews, Calculator Pro or Voicena?

Calculator Pro is rated higher. Calculator Pro averages 4.4 out of 5 from 62 ratings, while Voicena averages 3.6 from 5 ratings.

### Do Calculator Pro or Voicena have ads?

Calculator Pro shows ads; Voicena does not.

### Which is updated more often, Calculator Pro or Voicena?

Calculator Pro ships an update every 2 weeks, and Voicena every 3 weeks. Most recently, Calculator Pro was updated on November 5, 2026 and Voicena on October 30, 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.*