Comparison

f(x) Calc vs Lovable Builder Guide

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

f(x) Calc

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
Read full description

Full-featured Scientific Educational calculator with Natural Maths entry. Ideal for Maths and Science study with a built-in examples that will help you to learn how to use your calculator.   The perfect backup when you don't have your school calculator. Try the Junior mode for every-day use, with easy access to the most essential functions.

About

Lovable Builder Guide

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
Read full description

Lovable Builder Guide provides a structured environment to explore how intelligent tools can become part of everyday development practice. The app offers a collection of guides that explain modern coding approaches in a consistent format, so you can stay focused on learning and trying new techniques. KEY TOPICS This section covers practical use of automation and machine learning in development, including generating code, improving and restructuring existing code, fixing errors, writing prompts, creating tests, documenting projects, and exploring new programming languages with the support of modern tools. INTERFACE OVERVIEW: 1. Guides Catalog Browse a structured collection of guides presented as visual cards with short descriptions and estimated completion time. Content can be sorted by Popular, New, or Recommended, while premium guides are visually marked so they stand out from the rest. 2. Learning Screen Each section presents information in a structured format, including organized instructions, separated examples of code and commands, and additional tips such as keyboard shortcuts when available. 3. Favorites Save selected guides to a dedicated section for quick return. The Favorites screen allows you to view saved items, open them instantly, or remove them from the list when they are no longer needed. FREE & PRO VERSIONS Free: Includes one available guide Pro: Provides full access to all guides along with the complete set of content Discover new ways to approach development, expand your skills, and shape your personal coding process with Lovable Builder Guide. Privacy Policy: https://docs.google.com/document/d/1TUBmi6sedtZjQOXbsxVhR4LDEhFDPqOqqKOz5zjKnbs/edit?usp=sharing Term of Use: https://docs.google.com/document/d/1PpT606ySfuDG2MhU7SfQXgZzQ2KKr0GwE9gviFeEn4g/edit?usp=sharing

Screenshots

f(x) Calc4 screens
Lovable Builder Guide3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
f(x) Calc versus Lovable Builder Guide: the parameters behind the verdict, then further details
Parameterf(x) CalcLovable Builder Guide
PriceFreeFree
Rating5.0 (1 ratings) — better4.6 (7 ratings)
Positive reviews—100.0% of reviews
Number of ratings17 — better
Update frequencyEvery 10 daysWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad — betteriPhone
Requires iOS16.6 — better17.0
Further details — not scored
Size5 MB7 MB
Age rating4+4+
DeveloperDavid RussellKION SOLE SHAREHOLDER CO. LTD

Customer experience

f(x) Calc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Lovable Builder Guide

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

f(x) Calc

One-time1
  • Full AccessFree
3 purchases

Lovable Builder Guide

Subscriptions2
  • Guides Pro$5.997 Days
  • Coding Guides Pro3 Days trial$5.997 Days
One-time1
  • Coding Guides Lifetime$119.99

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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