# f(x) Calc vs Zcode Builder Guide

The clearest difference is rating: f(x) Calc at 5.0 against Zcode Builder Guide's 4.6. f(x) Calc also leads on monetization model (free vs freemium) and update cadence (every 10 days vs monthly). Zcode Builder Guide's advantage is ratings volume (7 vs 1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. f(x) Calc sells 1 one-off in-app purchase and Zcode Builder Guide sells 4 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

f(x) Calc holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Zcode Builder Guide has 7 ratings behind it against 1, so its average is the more settled of the two.

f(x) Calc ships an update every 10 days, Zcode Builder Guide monthly. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | f(x) Calc | Zcode Builder Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fx-calc/id6760609257/reviews)** | [4.6 (7 ratings)](https://appshunter.io/ios/app/zcode-builder-guide/id6762610319/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | **Free** | Freemium |
| Size | 5 MB | 4 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [David Russell](https://appshunter.io/developer/1104864276) | [KION SOLE SHAREHOLDER CO. LTD](https://appshunter.io/developer/1894828586) |

## What reviewers say

### f(x) Calc

[App page](https://appshunter.io/ios/app/fx-calc/id6760609257)

A full-featured scientific calculator designed for math and science students. It offers natural math entry and includes built-in examples to aid learning. A simplified Junior mode is available for everyday use.

**Highlights:** Natural Maths entry, Built-in learning examples, Junior mode for everyday use, Ideal for math and science study, Full-featured scientific calculator

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | Free | one-time |


### Zcode Builder Guide

[App page](https://appshunter.io/ios/app/zcode-builder-guide/id6762610319)

Explore modern coding approaches with a structured guide to intelligent development tools. Learn to generate code, fix errors, and document projects. Access a catalog of guides with clear instructions and examples.

**Highlights:** Structured guides for modern coding, Code generation and improvement, Error fixing and debugging, Project documentation assistance, Catalog of learning resources, Favorites for quick access

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coding Guides Pro | $5.99 | per 7 days |
| Coding Guides Pro | $6.99 | per 7 days |
| Coding Guides Trial | $6.99 | per 7 days |
| Coding Guides Lifetime | $119.99 | one-time |


## Frequently asked questions

### Is f(x) Calc free?

f(x) Calc is free to download, with in-app purchases available.

### Is Zcode Builder Guide free?

Zcode Builder Guide is free to download, with in-app purchases available.

### Which has better reviews, f(x) Calc or Zcode Builder Guide?

f(x) Calc is rated higher. f(x) Calc averages 5.0 out of 5 from 1 ratings, while Zcode Builder Guide averages 4.6 from 7 ratings.

### Do f(x) Calc or Zcode Builder Guide have ads?

Neither f(x) Calc nor Zcode Builder Guide shows ads.

### Which is updated more often, f(x) Calc or Zcode Builder Guide?

f(x) Calc ships an update every 10 days, and Zcode Builder Guide monthly. Most recently, f(x) Calc was updated on October 10, 2026 and Zcode Builder Guide 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.*