# Appliance Unit Meter vs Alerta app

The clearest difference is in-app purchases: Appliance Unit Meter at none against Alerta app's 2. Appliance Unit Meter also leads on iOS requirement (13.0 vs 17.6). Alerta app's advantage is update cadence (every 10 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Alerta app sells 2 in-app purchases, starting at $1.99 per month. Appliance Unit Meter asks for nothing beyond the download.

Appliance Unit Meter ships an update every 4 months, Alerta app every 10 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Appliance Unit Meter | Alerta app |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 5 MB | 75 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Ihsan Ullah](https://appshunter.io/developer/1488089071) | [NOPOINT Limited](https://appshunter.io/developer/1848317932) |

## What reviewers say

### Appliance Unit Meter

[App page](https://appshunter.io/ios/app/appliance-unit-meter/id1613668653)

Calculate your monthly electricity bill by inputting appliance wattage, quantity, and usage time. Set your per-unit electricity price and GST to get an accurate estimate.

**Highlights:** Calculate electricity bills, Input appliance wattage, Set usage time, Configure per-unit price, Add GST, Offline functionality

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

**In-app purchases:** none


### Alerta app

[App page](https://appshunter.io/ios/app/alerta-app/id6754450441)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $17.99 | per year |


## Frequently asked questions

### Is Appliance Unit Meter free?

Appliance Unit Meter is free to download, with no in-app purchases.

### Is Alerta app free?

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

### Do Appliance Unit Meter or Alerta app have ads?

Neither Appliance Unit Meter nor Alerta app shows ads.

### Which is updated more often, Appliance Unit Meter or Alerta app?

Appliance Unit Meter ships an update every 4 months, and Alerta app every 10 days. Most recently, Appliance Unit Meter was updated on October 20, 2026 and Alerta app on October 24, 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.*