# E vs HSA

The clearest difference is update cadence: HSA at every 2 months against E's every 4 months. HSA also leads on iOS requirement (9.0 vs 16.0). 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.

E ships an update every 4 months, HSA every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | E | HSA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (24 ratings)](https://appshunter.io/ios/app/e-tuner-4/id1579096205/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 46.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 51 MB | 6 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Edelbrock Corp](https://appshunter.io/developer/1579096297) | [杏生 卢](https://appshunter.io/developer/1094592555) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-tuner-4/id1579096205)

This app connects wirelessly to an EFI system, allowing users to monitor engine data and adjust various settings like air-fuel ratios and ignition timing. It offers a setup wizard for initial calibration and advanced tuning options for performance optimization.

**Highlights:** Bluetooth ECU communication, Live tuning of ECU settings, Real-time engine and sensor data monitoring, Setup Wizard for base calibration, Advanced tuning functions, Diagnostic troubleshooting page, Vivid gauge displays

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

**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 E free?

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

### Is HSA free?

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

### Do E or HSA have ads?

Neither E nor HSA shows ads.

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

E ships an update every 4 months, and HSA every 2 months. Most recently, E was updated on October 24, 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.*