# M vs HSA

The clearest difference is update cadence: M at monthly against HSA's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

M ships an update monthly, HSA every 2 months. The most recent releases landed on October 17, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | M | HSA |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | — |
| Size | 5 MB | 6 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [G.M.A. Italia s.r.l.](https://appshunter.io/developer/1622782479) | [杏生 卢](https://appshunter.io/developer/1094592555) |

## What reviewers say

### M

[App page](https://appshunter.io/ios/app/m-dspa401/id1229937158)

Control your car amplifier's integrated Digital Signal Processor (DSP) settings directly from your iPhone. Adjust EQ, bass, 3D sound, time alignment, and more. Save and load custom sound profiles to your phone or the amplifier.

**Highlights:** DSP control, EQ adjustment, Bass control, 3D sound effects, Time alignment, Save/load sound settings

**Features:** macOS Compatibility

**In-app purchases:** none


### HSA

[App page](https://appshunter.io/ios/app/hsa-10pro/id6446188767)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is M free?

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

### Is HSA free?

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

### Do M or HSA have ads?

Neither M nor HSA shows ads.

### Which is updated more often, M or HSA?

M ships an update monthly, and HSA every 2 months. Most recently, M was updated on October 17, 2026 and HSA on October 27, 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.*