# FiSi-Training: IT Practice — Subnetting, IPv4, IPv6, Ports

> Subnetting, IPv4, IPv6, Ports (iPhone/iPad app by Igor Wilhelm.)

- Source: https://appshunter.io/ios/app/fisi-training-it-practice/id6765818122 (this page in markdown: same URL + `.md`)
- Developer: [Igor Wilhelm](https://appshunter.io/developer/1894111768)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English, German (Germany)
- Released: 2026-09-03
- Data updated: 2026-09-06
- User reviews in markdown: https://appshunter.io/ios/app/fisi-training-it-practice/id6765818122/reviews.md

## What is FiSi?

Master IT networking through practice, not theory.

FiSi-Training: IT Practice is a hands-on learning app for networking fundamentals, designed for students and learners preparing for IT certifications such as CompTIA Network+ and CCNA-level topics.

Instead of passive videos or reading-heavy courses, you solve real interactive problems and get instant feedback.

---

What you practice

Train across 15 structured modules covering essential IT and networking skills:

* Binary, decimal, and hexadecimal conversions
* IPv4 subnetting and network calculations
* IPv6 subnetting and address structure
* Network IDs, broadcast addresses, and host ranges
* VLSM (Variable Length Subnet Masking)
* Public vs private IP addressing
* TCP/UDP ports and services
* OSI model and protocol layers
* Logic gates and digital fundamentals
* Truth tables and boolean logic
* Data transfer rate calculations
* Bandwidth and throughput conversions

---

Learn by doing

Each task follows a simple loop:

* Generate a new problem
* Solve it interactively
* Get instant correctness feedback
* Reveal the correct solution if needed
* Track your progress over time

---

Exam simulation mode

Prepare under real exam conditions:

* Custom test duration (10–60 minutes)
* Select specific modules or all topics
* Normal or expert difficulty mode
* Timed questions with scoring system
* Detailed results breakdown per topic
* Weakness analysis to improve faster

---

Progress tracking & leaderboard

* Track your performance across modules
* Review past exam sessions
* Identify weak areas automatically
* Compare results on global leaderboards (Premium)

---

Who this app is for

Perfect for:

* IT students and apprentices
* CompTIA Network+ learners
* CCNA beginners
* System and network administrators in training
* Anyone learning networking fundamentals

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Premium features

Upgrade to unlock:

* Unlimited practice questions
* Full exam simulation mode
* Advanced statistics and history
* Global leaderboard access
* Timer and expert difficulty modes

---

Why this app works

Networking is not learned by watching. It is learned by solving.

This app turns core IT concepts into interactive problem-solving drills so you actually understand subnetting, addressing, and protocols instead of memorizing them.

Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium - Weekly | $4.99 | per 7 days |
| Premium - Monthly | $9.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium - Lifetime | $29.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-03

No release notes.

## More apps by Igor Wilhelm

- [Mallorca Routes: Bus & Train](https://appshunter.io/ios/app/mallorca-routes-bus-and-train/id6762422441)

All apps by Igor Wilhelm: https://appshunter.io/developer/1894111768

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*