# HVAC AI vs Multimeter Simulator

The clearest difference is update cadence: Multimeter Simulator at every 2 months against HVAC AI's every 12 months. Multimeter Simulator also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. HVAC AI sells 4 in-app purchases, starting at $5.69 per 7 days and Multimeter Simulator sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

HVAC AI ships an update every 12 months, Multimeter Simulator every 2 months. The most recent releases landed on September 30, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | HVAC AI | Multimeter Simulator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 months** |
| Size | 390 MB | 57 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [RODRIGO DIAZ](https://appshunter.io/developer/1575990541) | [沛洁 赖](https://appshunter.io/developer/1895142467) |

## What reviewers say

### HVAC AI

[App page](https://appshunter.io/ios/app/hvac-ai-tools-and-simulator/id6747603414)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Offer | $5.69 | per 7 days |
| Weekly | $5.69 | per 7 days |
| Annual Offer | $46.49 | per year |
| Annual Subscription | $57.90 | per year |


### Multimeter Simulator

[App page](https://appshunter.io/ios/app/multimeter-simulator/id6763448679)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| three-day experience | $1.29 | one-time |
| one-year VIP | $8.99 | one-time |
| Lifetime VIP | $15.90 | one-time |


## Frequently asked questions

### Is HVAC AI free?

HVAC AI is free to download, with in-app purchases available.

### Is Multimeter Simulator free?

Multimeter Simulator is free to download, with in-app purchases available.

### Do HVAC AI or Multimeter Simulator have ads?

Neither HVAC AI nor Multimeter Simulator shows ads.

### Which is updated more often, HVAC AI or Multimeter Simulator?

HVAC AI ships an update every 12 months, and Multimeter Simulator every 2 months. Most recently, HVAC AI was updated on September 30, 2026 and Multimeter Simulator on October 18, 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.*