# Foundations Memory Work C3 vs Number Builder

The clearest difference is review sentiment: Number Builder at 100% against Foundations Memory Work C3's 36%. Number Builder also leads on price (Free vs $9.99) and rating (4.9 vs 3.6). Foundations Memory Work C3's advantage is in-app purchases (none vs 1) and ratings volume (171 vs 7). On ads, monetization model and device support there is nothing between them.

Number Builder is free to download; Foundations Memory Work C3 costs $9.99 up front. Number Builder sells 1 one-off in-app purchase. Foundations Memory Work C3 asks for nothing beyond the download.

Number Builder holds the better App Store score, 4.9 against 3.6. That said, the two scores are not equally well evidenced: Foundations Memory Work C3 has 171 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 36% of Foundations Memory Work C3's written reviews are positive against 100% of Number Builder's.

Foundations Memory Work C3 ships an update every 16 months, Number Builder every 39 months. The most recent releases landed on September 21, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | Foundations Memory Work C3 | Number Builder |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.6 (171 ratings)](https://appshunter.io/ios/app/foundations-memory-work-c3/id501527692/reviews) | **[4.9 (7 ratings)](https://appshunter.io/ios/app/number-builder-puzzle-solver/id1489526164/reviews)** |
| Number of ratings | **171** | 7 |
| Positive reviews | 36.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 16 months** | Every 39 months |
| Monetization | Free | Free |
| Best chart rank | **#11** | — |
| Size | 739 MB | 4 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Classical Conversations](https://appshunter.io/developer/501527695) | [Widgetilities LLC](https://appshunter.io/developer/1373578566) |

## What reviewers say

### Foundations Memory Work C3

[App page](https://appshunter.io/ios/app/foundations-memory-work-c3/id501527692)

**Currently charting:** #11 Top Paid · Education (US App Store)

Enhance learning through memorization of quality content with art and song. This interactive app covers seven subject areas, including enhanced graphics, a timeline, and U.S. presidents.

**Highlights:** Memorize quality content, Learn with art and song, Interactive format, Seven subject areas, Enhanced graphics, Classical Acts & Facts timeline, U.S. presidents

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

**In-app purchases:** none

**What reviewers like**

- 👍 Great for on-the-go review
- 🖼️ Beautiful graphics
- 💡 Helpful for independent review
- ✨ Visuals keep kids interested
- 🚀 Convenient and mobile

**What reviewers complain about**

- 💰 High price for functionality
- 🎶 Missing key songs (Timeline, President's, etc.)
- 🚶 Clumsy navigation (swiping)
- 📚 Basic and not engaging
- ⏳ Outdated content

**Reported bugs**

- Screen rotation issues
- App disrupts phone's screen rotation
- Content not loading correctly (e.g., only math)
- Outdated content (e.g., President Biden not listed)
- Latin pronunciation abysmal

**Requested features**

- Organize material into a weekly format
- Add the Timeline song (in its entirety)
- Add President's Song
- Add States and Capitals song
- Add History song


### Number Builder

[App page](https://appshunter.io/ios/app/number-builder-puzzle-solver/id1489526164)

This app helps solve math puzzles by calculating all possible equations from dice rolls and a target number. It supports basic arithmetic, powers, and roots, making it a useful tool for games like Number Knockout.

**Highlights:** Calculates all possible solutions, Supports basic arithmetic, Includes powers and roots, Input dice rolls and target number, Useful for Number Knockout game

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Challenge Mode | $1.99 | one-time |


## Frequently asked questions

### Is Foundations Memory Work C3 free?

Foundations Memory Work C3 costs $9.99, with no in-app purchases.

### Is Number Builder free?

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

### Which has better reviews, Foundations Memory Work C3 or Number Builder?

Number Builder is rated higher. Foundations Memory Work C3 averages 3.6 out of 5 from 171 ratings, while Number Builder averages 4.9 from 7 ratings.

### Do Foundations Memory Work C3 or Number Builder have ads?

Neither Foundations Memory Work C3 nor Number Builder shows ads.

### Which is updated more often, Foundations Memory Work C3 or Number Builder?

Foundations Memory Work C3 ships an update every 16 months, and Number Builder every 39 months. Most recently, Foundations Memory Work C3 was updated on September 21, 2026 and Number Builder on August 12, 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.*