# A6 vs EICAS Ref

The clearest difference is price: EICAS Ref at $12.99 against A6's $24.99. EICAS Ref also leads on update cadence (daily vs every 9 days). A6's advantage is iOS requirement (15.6 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

A6 costs $24.99 and EICAS Ref $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A6 ships an update every 9 days, EICAS Ref daily. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | A6 | EICAS Ref |
| --- | --- | --- |
| Price | $24.99 | **$12.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Daily** |
| Size | 4 MB | 31 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Ricardo Fernando Bezerra Pinheiro](https://appshunter.io/developer/1853012490) | [Michael Camacho](https://appshunter.io/developer/6823071622) |

## What reviewers say

### A6

[App page](https://appshunter.io/ios/app/a6-777-tech-quiz/id6755300520)

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

**In-app purchases:** none


### EICAS Ref

[App page](https://appshunter.io/ios/app/eicas-ref/id6823071619)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A6 free?

A6 costs $24.99, with no in-app purchases.

### Is EICAS Ref free?

EICAS Ref costs $12.99, with no in-app purchases.

### Do A6 or EICAS Ref have ads?

Neither A6 nor EICAS Ref shows ads.

### Which is updated more often, A6 or EICAS Ref?

A6 ships an update every 9 days, and EICAS Ref daily. Most recently, A6 was updated on November 9, 2026 and EICAS Ref on November 10, 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.*