# Math Facts Fluency Builder vs Just Math Facts

The clearest difference is price: Just Math Facts at Free against Math Facts Fluency Builder's $3.99. Just Math Facts also leads on update cadence (every 4 days vs every 38 months). Math Facts Fluency Builder's advantage is in-app purchases (none vs 1) and iOS requirement (12.2 vs 18.4). On ads and device support there is nothing between them.

Just Math Facts is free to download; Math Facts Fluency Builder costs $3.99 up front. Just Math Facts sells 1 one-off in-app purchase. Math Facts Fluency Builder asks for nothing beyond the download.

Math Facts Fluency Builder ships an update every 38 months, Just Math Facts every 4 days. The most recent releases landed on September 19, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | Math Facts Fluency Builder | Just Math Facts |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/just-math-facts/id6747115236/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 7 MB |
| Requires iOS | **12.2** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [Brian Prokop](https://appshunter.io/developer/1777511926) |

## What reviewers say

### Math Facts Fluency Builder

[App page](https://appshunter.io/ios/app/math-facts-fluency-builder/id1120776629)

**Features:** macOS Compatibility

**In-app purchases:** none


### Just Math Facts

[App page](https://appshunter.io/ios/app/just-math-facts/id6747115236)

Sharpen your arithmetic skills with timed drills and custom problem sets. Track your progress with detailed metrics on percentage, speed, and accuracy. This app offers a fun way to master addition, subtraction, multiplication, and division.

**Highlights:** Addition, subtraction, multiplication, division modes, Mixed "blend" mode, Customizable problem count (5-100), Adjustable time limit (1-60 minutes), Performance tracking (percentage, speed, accuracy), Ad-free option via in-app purchase

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Add Free $1.99 | $1.99 | one-time |


## Frequently asked questions

### Is Math Facts Fluency Builder free?

Math Facts Fluency Builder costs $3.99, with no in-app purchases.

### Is Just Math Facts free?

Just Math Facts is free to download, with in-app purchases available.

### Do Math Facts Fluency Builder or Just Math Facts have ads?

Neither Math Facts Fluency Builder nor Just Math Facts shows ads.

### Which is updated more often, Math Facts Fluency Builder or Just Math Facts?

Math Facts Fluency Builder ships an update every 38 months, and Just Math Facts every 4 days. Most recently, Math Facts Fluency Builder was updated on September 19, 2026 and Just Math Facts on July 4, 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.*