# AC Calculator vs ParamaGPS

The clearest difference is in-app purchases: ParamaGPS at none against AC Calculator's 2. ParamaGPS also leads on update cadence (every 3 days vs every 4 months) and iOS requirement (13.0 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. ParamaGPS asks for nothing beyond the download.

AC Calculator ships an update every 4 months, ParamaGPS every 3 days. The most recent releases landed on September 18, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | AC Calculator | ParamaGPS |
| --- | --- | --- |
| 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 | 60 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Melchisedec Martinez Rodriguez](https://appshunter.io/developer/1534398511) | [MYANMAR PARAMA TECHNOLOGIES COMPANY LIMITED](https://appshunter.io/developer/1634422794) |

## 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 | $1.99 | one-time |
| Unlock Advanced mode | $3.99 | one-time |


### ParamaGPS

[App page](https://appshunter.io/ios/app/paramagps/id6739284171)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AC Calculator free?

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

### Is ParamaGPS free?

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

### Do AC Calculator or ParamaGPS have ads?

Neither AC Calculator nor ParamaGPS shows ads.

### Which is updated more often, AC Calculator or ParamaGPS?

AC Calculator ships an update every 4 months, and ParamaGPS every 3 days. Most recently, AC Calculator was updated on September 18, 2026 and ParamaGPS on September 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*