# ONS+ vs Calculadora de Imposto

The clearest difference is in-app purchases: ONS+ at none against Calculadora de Imposto's 2. ONS+ also leads on ads (none vs shown) and device support (3 vs 1). Calculadora de Imposto's advantage is update cadence (every 2 weeks vs every 3 months). On price there is nothing between them.

Both are free to download. Calculadora de Imposto sells 2 in-app purchases, starting at $0.99 per month. ONS+ asks for nothing beyond the download.

ONS+ ships an update every 3 months, Calculadora de Imposto every 2 weeks. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ONS+ | Calculadora de Imposto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ons-plus/id1526485784/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 49 MB | 3 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ONS - OPERADOR NACIONAL DO SISTEMA ELETRICO](https://appshunter.io/developer/1380823163) | [Dan Studio Apps](https://appshunter.io/developer/1728888695) |

## What reviewers say

### ONS+

[App page](https://appshunter.io/ios/app/ons-plus/id1526485784)

Access real-time data on the National Electric System's operation from your mobile device. Monitor energy load, semi-hourly CMO, and generation. Receive alerts, download products, and track upcoming events.

**Highlights:** Real-time operation data, Energy load monitoring, Semi-hourly CMO tracking, Generation information, News alerts, Product downloads, Event tracking

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

**In-app purchases:** none


### Calculadora de Imposto

[App page](https://appshunter.io/ios/app/calculadora-de-imposto/id6762571048)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Mensal | $0.99 | per month |
| Premium Anual | $7.99 | per year |


## Frequently asked questions

### Is ONS+ free?

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

### Is Calculadora de Imposto free?

Calculadora de Imposto is free to download, with in-app purchases available.

### Do ONS+ or Calculadora de Imposto have ads?

Calculadora de Imposto shows ads; ONS+ does not.

### Which is updated more often, ONS+ or Calculadora de Imposto?

ONS+ ships an update every 3 months, and Calculadora de Imposto every 2 weeks. Most recently, ONS+ was updated on October 29, 2026 and Calculadora de Imposto on October 25, 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.*