# f(x) Calc vs Lovable Builder Guide

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

Both are free to download. f(x) Calc sells 1 one-off in-app purchase and Lovable Builder Guide sells 3 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: Lovable 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, Lovable Builder Guide weekly. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | f(x) Calc | Lovable 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/lovable-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 | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 5 MB | 7 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 |


### Lovable Builder Guide

[App page](https://appshunter.io/ios/app/lovable-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 (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Guides Pro | $5.99 | per 7 days |
| Coding Guides Pro | $5.99 | 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 Lovable Builder Guide free?

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

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

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

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

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

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

f(x) Calc ships an update every 10 days, and Lovable Builder Guide weekly. Most recently, f(x) Calc was updated on September 23, 2026 and Lovable Builder Guide on September 19, 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.*