# AC Calculator vs S.A.M.

The clearest difference is in-app purchases: S.A.M. at none against AC Calculator's 2. S.A.M. also leads on update cadence (every 3 days vs every 4 months) and iOS requirement (14.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. AC Calculator sells 2 one-off in-app purchases. S.A.M. asks for nothing beyond the download.

AC Calculator ships an update every 4 months, S.A.M. every 3 days. The most recent releases landed on October 18, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | AC Calculator | S.A.M. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (20 ratings)](https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761/reviews)** | — |
| Number of ratings | **20** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 62 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Melchisedec Martinez Rodriguez](https://appshunter.io/developer/1534398511) | [Eficiencia Energetica y Seguridad S.A de C.V.](https://appshunter.io/developer/1417341104) |

## What reviewers say

### AC Calculator

[App page](https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761)

This utility app simplifies HVAC sizing by calculating BTU/h capacity and recommending equipment. It offers unit conversions, price estimates, and energy consumption comparisons. Advanced features can be unlocked via in-app purchases.

**Highlights:** Calculate BTU/h capacity, Recommend equipment types, Convert BTU, kW, Kcal, Tons, Check price estimates, Compare inverter vs. conventional

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock View details | $4.99 | one-time |
| Unlock Advanced mode | $9.99 | one-time |


### S.A.M.

[App page](https://appshunter.io/ios/app/sam/id6475045112)

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

**In-app purchases:** none


## Frequently asked questions

### Is AC Calculator free?

AC Calculator is free to download, with in-app purchases available.

### Is S.A.M. free?

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

### Do AC Calculator or S.A.M. have ads?

Neither AC Calculator nor S.A.M. shows ads.

### Which is updated more often, AC Calculator or S.A.M.?

AC Calculator ships an update every 4 months, and S.A.M. every 3 days. Most recently, AC Calculator was updated on October 18, 2026 and S.A.M. on September 30, 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.*