# Numerical³ vs Volume Booster

The clearest difference is rating: Numerical³ at 4.8 against Volume Booster's 3.6. Numerical³ also leads on in-app purchases (none vs 5) and ads (none vs shown). Volume Booster's advantage is iOS requirement (16.0 vs 18.0). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Volume Booster sells 5 in-app purchases, starting at $2.99 per 7 days. Numerical³ asks for nothing beyond the download.

Numerical³ holds the better App Store score, 4.8 against 3.6. Both are backed by a comparable volume of ratings — 1.3K and 681 respectively. Written reviews point the same way: 75% of Numerical³'s written reviews are positive against 57% of Volume Booster's.

Numerical³ ships an update every 2 weeks, Volume Booster every 3 weeks. Both last shipped on September 19, 2026.

## The numbers

| Metric | Numerical³ | Volume Booster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.3K ratings)](https://appshunter.io/ios/app/numerical/id804548449/reviews)** | [3.6 (681 ratings)](https://appshunter.io/ios/app/volume-booster-equalizer-fx/id1487361377/reviews) |
| Number of ratings | **1.3K** | 681 |
| Positive reviews | **75.4% of reviews** | 57.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 113 MB | 78 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew J Clark](https://appshunter.io/developer/804548452) | [Kartum Infotech](https://appshunter.io/developer/1258050826) |

## What reviewers say

### Numerical³

[App page](https://appshunter.io/ios/app/numerical/id804548449)

A powerful and beautifully designed calculator app that offers advanced scientific functions, automatic bracket handling, and a unique no-equals button interface. It integrates seamlessly with iOS features like widgets and keyboards for calculations anywhere.

**Highlights:** No equals button interface, Automatic bracket handling, Full scientific keypad, Today Widget integration, Numerical² Keyboard for any app, Equation editing, Customizable themes

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app
- 👍 Simple and intuitive
- 👍 Clean and beautiful design
- 🚀 Fast and responsive
- 👍 Customizable themes

**What reviewers complain about**

- 🐛 Bugs and glitches (unresponsive keys, calculation errors)
- 🔍 Lack of advanced functions (scientific, unit conversion)
- 💡 Needs more theme options
- 💡 Needs iPad support
- 💡 Needs widget support

**Reported bugs**

- Unresponsive keys
- Calculation errors
- Crashes on startup

**Requested features**

- Add scientific functions (square root, trigonometry, etc.)
- Implement an equals button
- Add more theme options
- Develop an iPad version
- Bring back widget support


### Volume Booster

[App page](https://appshunter.io/ios/app/volume-booster-equalizer-fx/id1487361377)

Enhance your device's audio with this app, offering volume boosting, bass enhancement, and a customizable equalizer. It includes an offline music player with 3D surround sound capabilities, allowing you to fine-tune audio for music, videos, and more.

**Highlights:** Volume boosting up to 1000%, Bass booster and virtualizer, 10-band customizable equalizer, Offline music player, 3D surround sound with 8D effects, Supports various audio formats

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly unlimited | $2.99 | per 7 days |
| Monthly unlimited | $3.99 | per month |
| Quarterly unlimited | $5.99 | per 3 months |
| Yearly unlimited | $9.99 | per year |
| Volume Booster Pro, Lifetime! | $39.99 | one-time |

**What reviewers like**

- 🚀 Volume booster
- 👍 Excellent sound quality
- 🔋 Enhances audio experience
- 🔊 Powerful bass boost
- 🎧 Works well with speakers/headphones

**What reviewers complain about**

- 🐛 Doesn't work with existing music
- 💰 Requires subscription for full features
- 📢 Too many ads in free version
- 🔌 Doesn't work with all devices
- 🤔 Confusing to use

**Reported bugs**

- App crashes frequently
- Volume boost not working consistently
- Subscription issues

**Requested features**

- Offline mode
- Equalizer controls
- Ability to save custom settings
- Integration with music streaming apps


## Frequently asked questions

### Is Numerical³ free?

Numerical³ is free to download, with no in-app purchases.

### Is Volume Booster free?

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

### Which has better reviews, Numerical³ or Volume Booster?

Numerical³ is rated higher. Numerical³ averages 4.8 out of 5 from 1.3K ratings, while Volume Booster averages 3.6 from 681 ratings.

### Do Numerical³ or Volume Booster have ads?

Volume Booster shows ads; Numerical³ does not.

### Which is updated more often, Numerical³ or Volume Booster?

Numerical³ ships an update every 2 weeks, and Volume Booster every 3 weeks. Most recently, Numerical³ was updated on September 19, 2026 and Volume Booster on September 19, 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.*