# Electrical Engineer's Tool vs Viettel Tammi

The clearest difference is review sentiment: Electrical Engineer's Tool at 91% against Viettel Tammi's 14%. Electrical Engineer's Tool also leads on rating (5.0 vs 2.6) and iOS requirement (10.0 vs 16.0). Viettel Tammi's advantage is in-app purchases (none vs 3) and ratings volume (220 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Electrical Engineer's Tool sells 3 in-app purchases, starting at $3.99 per 3 months. Viettel Tammi asks for nothing beyond the download.

Electrical Engineer's Tool holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: Viettel Tammi has 220 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 91% of Electrical Engineer's Tool's written reviews are positive against 14% of Viettel Tammi's.

Electrical Engineer's Tool ships an update every 4 days, Viettel Tammi every 3 days. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Electrical Engineer's Tool | Viettel Tammi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/electrical-engineers-tool-eet/id1584962868/reviews)** | [2.6 (220 ratings)](https://appshunter.io/ios/app/viettel-tammi/id6749427319/reviews) |
| Number of ratings | 1 | **220** |
| Positive reviews | **90.9% of reviews** | 13.8% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Best chart rank | — | **#97** |
| Size | 43 MB | 432 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ninh Viet Tu](https://appshunter.io/developer/1442044927) | [Viettel Telecom](https://appshunter.io/developer/365850426) |

## What reviewers say

### Electrical Engineer's Tool

[App page](https://appshunter.io/ios/app/electrical-engineers-tool-eet/id1584962868)

This comprehensive tool offers a wide array of electrical calculations, including wire sizing, voltage drop, power, and motor-related computations. It also provides extensive resources like color codes, fuse types, and pinout diagrams for various connectors. Essential for electrical engineers and technicians.

**Highlights:** Extensive electrical calculations, Electronic component calculations, Motor-related computations, Unit conversions, Comprehensive reference resources, Pinout diagrams for connectors

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 months (89.000 VND) | $3.99 | per 3 months |
| 1 Year (249.000 VNĐ/year) | $19.49 | per year |
| Lifetime EET (552.000 VND) | $22.99 | one-time |


### Viettel Tammi

[App page](https://appshunter.io/ios/app/viettel-tammi/id6749427319)

**Currently charting:** #97 Top Free · Business (US App Store)

This app simplifies daily life by integrating essential services like telecommunications, health, travel, and education. It offers convenient family utilities such as bill payments and personalized shopping with exclusive deals. Connect with others through its built-in call, chat, and meeting features.

**Highlights:** Smart telecommunications management, Integrated health, travel, and education services, Family utility bill payments, Personalized shopping and deals, OTT communication features (call, chat, meeting), User-friendly interface

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Electrical Engineer's Tool free?

Electrical Engineer's Tool is free to download, with in-app purchases available.

### Is Viettel Tammi free?

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

### Which has better reviews, Electrical Engineer's Tool or Viettel Tammi?

Electrical Engineer's Tool is rated higher. Electrical Engineer's Tool averages 5.0 out of 5 from 1 ratings, while Viettel Tammi averages 2.6 from 220 ratings.

### Do Electrical Engineer's Tool or Viettel Tammi have ads?

Neither Electrical Engineer's Tool nor Viettel Tammi shows ads.

### Which is updated more often, Electrical Engineer's Tool or Viettel Tammi?

Electrical Engineer's Tool ships an update every 4 days, and Viettel Tammi every 3 days. Most recently, Electrical Engineer's Tool was updated on October 7, 2026 and Viettel Tammi 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.*