# FlexTune vs Volume Booster.

The clearest difference is rating: Volume Booster. at 4.0 against FlexTune's 2.8. FlexTune's advantage is review sentiment (40% vs 0%) and in-app purchases (none vs 3). On price, update cadence and device support there is nothing between them.

Both are free to download. Volume Booster. sells 3 in-app purchases, starting at $5.99 per 7 days. FlexTune asks for nothing beyond the download.

Volume Booster. holds the better App Store score, 4.0 against 2.8. That said, the two scores are not equally well evidenced: FlexTune has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 40% of FlexTune's written reviews are positive against 0% of Volume Booster.'s, so the app with the better star average is not the one people write more warmly about.

FlexTune ships an update every 3 months, Volume Booster. every 2 months. The most recent releases landed on August 14, 2026 and August 17, 2026 respectively.

## The numbers

| Metric | FlexTune | Volume Booster. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (10 ratings)](https://appshunter.io/ios/app/flextune/id1417233546/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/volume-booster/id6479978105/reviews)** |
| Number of ratings | **10** | 2 |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 16 MB | 5 MB |
| Requires iOS | **8.2** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Kicker](https://appshunter.io/developer/1632645523) | [Nguyen Nam Giang](https://appshunter.io/developer/583763906) |

## What reviewers say

### FlexTune

[App page](https://appshunter.io/ios/app/flextune/id1417233546)

Personalize your car's audio system with this app. Easily adjust bass, clarity, and other sound settings using a five-band equalizer and create custom profiles for different music or moods. Enjoy wireless control of your KICKER audio system.

**Highlights:** Variable Five-Band Parametric Equalizer, Multiple Custom Presets, Remote KICKER Subwoofer Gain, Adjustable Center-Image Control, Bluetooth LE Enabled, Wireless Control

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

**In-app purchases:** none


### Volume Booster.

[App page](https://appshunter.io/ios/app/volume-booster/id6479978105)

Enhance your audio experience by increasing the volume of music, videos, and other audio content up to 10 times. It includes a built-in player for seamless playback and offers premium features for ad-free listening.

**Highlights:** Boosts audio volume up to 10x, Supports music, video, and audio, Includes built-in audio player, Removes advertisements with premium subscription, Offers weekly and monthly subscription plans

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Volume Booster Premium Weekly | $5.99 | per 7 days |
| Volume Booster Premium Monthly | $7.99 | per month |
| VolumeBooster Premium Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is FlexTune free?

FlexTune 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, FlexTune or Volume Booster.?

Volume Booster. is rated higher. FlexTune averages 2.8 out of 5 from 10 ratings, while Volume Booster. averages 4.0 from 2 ratings.

### Do FlexTune or Volume Booster. have ads?

Volume Booster. shows ads; FlexTune does not.

### Which is updated more often, FlexTune or Volume Booster.?

FlexTune ships an update every 3 months, and Volume Booster. every 2 months. Most recently, FlexTune was updated on August 14, 2026 and Volume Booster. on August 17, 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.*