# E Sentry Systems vs Increase Volume

The clearest difference is in-app purchases: E Sentry Systems at none against Increase Volume's 9. Increase Volume's advantage is update cadence (every 6 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Increase Volume sells 9 in-app purchases, starting at $3.99 per 7 days. E Sentry Systems asks for nothing beyond the download.

E Sentry Systems ships an update every 3 weeks, Increase Volume every 6 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | E Sentry Systems | Increase Volume |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/increase-volume-sound-boost/id6757870311/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 6 days** |
| Monetization | — | Subscription |
| Size | 54 MB | 112 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [IRISS Inc](https://appshunter.io/developer/1245323320) | [Ademola Kevin Bello](https://appshunter.io/developer/1791254375) |

## What reviewers say

### E Sentry Systems

[App page](https://appshunter.io/ios/app/e-sentry-systems/id6444192723)

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

**In-app purchases:** none


### Increase Volume

[App page](https://appshunter.io/ios/app/increase-volume-sound-boost/id6757870311)

Enhance audio and video recordings by increasing volume up to 3x. Improve speech clarity, reduce noise, and adjust playback speed. Compare original and enhanced versions before exporting.

**Highlights:** Amplify audio up to 3x, Improve voice clarity, Noise reduction, Adjust playback speed, Compare original and enhanced audio, Export audio or video

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $3.99 | per 7 days |
| Yearly Offer | $17.99 | per year |
| Pro Yearly | $22.99 | per year |
| Starter Pack | $2.99 | one-time |
| Offer Pack | $3.99 | one-time |
| Popular Pack | $7.99 | one-time |
| Pro LifeTime Offer | $14.99 | one-time |
| Best Value Pack | $19.99 | one-time |
| Pro LifeTime | $24.99 | one-time |


## Frequently asked questions

### Is E Sentry Systems free?

E Sentry Systems is free to download, with no in-app purchases.

### Is Increase Volume free?

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

### Do E Sentry Systems or Increase Volume have ads?

Neither E Sentry Systems nor Increase Volume shows ads.

### Which is updated more often, E Sentry Systems or Increase Volume?

E Sentry Systems ships an update every 3 weeks, and Increase Volume every 6 days. Most recently, E Sentry Systems was updated on November 7, 2026 and Increase Volume on October 31, 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.*