# Tech2 vs ESR ProMax

The clearest difference is update cadence: ESR ProMax at fortnightly against Tech2's every 3 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.

Tech2 ships an update every 3 months, ESR ProMax fortnightly. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Tech2 | ESR ProMax |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 52 MB | 65 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ECU=SHOP](https://appshunter.io/developer/1389703440) | [Suthipoj tripuwabhrut](https://appshunter.io/developer/1445632800) |

## What reviewers say

### Tech2

[App page](https://appshunter.io/ios/app/tech2/id6479217144)

This utility app offers real-time tuning and configuration for various operational modes. It provides advanced customization options for ignition timing, fuel, and compensation, along with anti-theft protection and analysis features.

**Highlights:** Real-time tuning, Anti-theft protection, Multiple operation modes, Injector tuning, Ignition timing tuning, BARO compensation

**Features:** macOS Compatibility

**In-app purchases:** none


### ESR ProMax

[App page](https://appshunter.io/ios/app/esr-promax/id6772112888)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tech2 free?

Tech2 is free to download, with no in-app purchases.

### Is ESR ProMax free?

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

### Do Tech2 or ESR ProMax have ads?

Neither Tech2 nor ESR ProMax shows ads.

### Which is updated more often, Tech2 or ESR ProMax?

Tech2 ships an update every 3 months, and ESR ProMax fortnightly. Most recently, Tech2 was updated on October 16, 2026 and ESR ProMax on October 6, 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.*