# Pythagoras Calculator vs ViFi

The clearest difference is in-app purchases: ViFi at none against Pythagoras Calculator's 8. ViFi also leads on update cadence (every 4 days vs every 4 weeks). Pythagoras Calculator's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Pythagoras Calculator sells 8 one-off in-app purchases. ViFi asks for nothing beyond the download.

Pythagoras Calculator ships an update every 4 weeks, ViFi every 4 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Pythagoras Calculator | ViFi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (248 ratings)](https://appshunter.io/ios/app/pythagoras-calculator/id1270384222/reviews)** | — |
| Number of ratings | **248** | — |
| Positive reviews | 83.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 179 MB | 18 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [Emre Buyuker](https://appshunter.io/developer/1470918848) |

## What reviewers say

### Pythagoras Calculator

[App page](https://appshunter.io/ios/app/pythagoras-calculator/id1270384222)

Easily calculate any side of a right-angled triangle using the Pythagorean theorem. Input two sides to find the third, with all calculations saved in a history. Supports fractions and offers an ad-free option.

**Highlights:** Pythagorean theorem calculations, Calculate any of the three sides, History of calculations, Supports fraction input, Shareable solutions, Ad-free option

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use and simple interface
- ✅ Accurate calculations for Pythagorean theorem
- 📚 Shows step-by-step solutions for learning
- 🚀 Fast and efficient computation
- 💼 Useful for construction and woodworking projects

**What reviewers complain about**

- 📢 Intrusive and annoying advertisements
- 💳 Deceptive payment practices and fraudulent charges
- 🔐 Suspicious credit card requirements for access
- ⚠️ Forced rating prompts
- ❌ Limited functionality (only works with 2 known sides)

**Reported bugs**

- App crashes or fails to calculate
- Paid ad removal not working properly
- Fraudulent payment processing through third-party sites
- Occasional incorrect calculation results
- App not functioning on iPhone 5SE and older devices

**Requested features**

- Calculate triangle angles
- Support angle-based calculations with one side
- Better monetization without aggressive ads
- Improved ratings system
- Real-time results display


### ViFi

[App page](https://appshunter.io/ios/app/vifi/id1470918849)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pythagoras Calculator free?

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

### Is ViFi free?

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

### Do Pythagoras Calculator or ViFi have ads?

Neither Pythagoras Calculator nor ViFi shows ads.

### Which is updated more often, Pythagoras Calculator or ViFi?

Pythagoras Calculator ships an update every 4 weeks, and ViFi every 4 days. Most recently, Pythagoras Calculator was updated on October 24, 2026 and ViFi 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.*