# A vs HAPPY

The clearest difference is price: HAPPY at Free against A's $8.99. HAPPY also leads on iOS requirement (16.6 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

HAPPY is free to download; A costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A ships an update every 3 weeks, HAPPY fortnightly. The most recent releases landed on September 23, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | A | HAPPY |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/a-projects/id1469182938/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 38.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Paid | — |
| Size | 59 MB | 3 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jutarus Ratanasethakul](https://appshunter.io/developer/1454380236) | [HAPPY SURVEY Sagl](https://appshunter.io/developer/1817171203) |

## What reviewers say

### A

[App page](https://appshunter.io/ios/app/a-projects/id1469182938)

This app simplifies structural analysis for engineers and architects. It uses Direct Stiffness Analysis to calculate shear forces, bending moments, and deflections for beams, trusses, and frames. Get instant results and detailed reports for documentation and learning.

**Highlights:** Direct Stiffness Analysis, Beam, truss, and frame analysis, Shear force, bending moment, deflection calculations, User-friendly interface, Detailed analysis reports, Educational resource

**In-app purchases:** none


### HAPPY

[App page](https://appshunter.io/ios/app/happy-q/id6751642638)

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

**In-app purchases:** none


## Frequently asked questions

### Is A free?

A costs $8.99, with no in-app purchases.

### Is HAPPY free?

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

### Do A or HAPPY have ads?

Neither A nor HAPPY shows ads.

### Which is updated more often, A or HAPPY?

A ships an update every 3 weeks, and HAPPY fortnightly. Most recently, A was updated on September 23, 2026 and HAPPY on September 11, 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.*