# Foundations Memory Work C3 vs NumberSlam®

The clearest difference is review sentiment: NumberSlam® at 100% against Foundations Memory Work C3's 36%. NumberSlam® also leads on price (Free vs $9.99) and rating (5.0 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, device support and iOS requirement there is nothing between them.

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

NumberSlam® holds the better App Store score, 5.0 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 NumberSlam®'s.

Foundations Memory Work C3 ships an update every 16 months, NumberSlam® every 6 days. The most recent releases landed on September 21, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Foundations Memory Work C3 | NumberSlam® |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.6 (171 ratings)](https://appshunter.io/ios/app/foundations-memory-work-c3/id501527692/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/numberslam/id1618839777/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 6 days** |
| Monetization | Free | Free |
| Best chart rank | **#16** | — |
| Size | 739 MB | 31 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Classical Conversations](https://appshunter.io/developer/501527695) | [PIRUX, LLC](https://appshunter.io/developer/1618629503) |

## What reviewers say

### Foundations Memory Work C3

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

**Currently charting:** #16 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


### NumberSlam®

[App page](https://appshunter.io/ios/app/numberslam/id1618839777)

This is a fast-paced mental math game designed to enhance your calculation skills on mobile. It's a digital adaptation of a popular classroom game, offering an engaging way to practice math for fun or improvement. The game is ad-free and tracks no user data for a safe, distraction-free experience.

**Highlights:** Improves mental math skills, Engaging and fast-paced gameplay, Digital remake of a popular classroom game, Ad-free experience, Tracking-free for user privacy, Suitable for practice or fun

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Activate NumberSlam | $7.99 | one-time |


## Frequently asked questions

### Is Foundations Memory Work C3 free?

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

### Is NumberSlam® free?

NumberSlam® is free to download, with in-app purchases available.

### Which has better reviews, Foundations Memory Work C3 or NumberSlam®?

NumberSlam® is rated higher. Foundations Memory Work C3 averages 3.6 out of 5 from 171 ratings, while NumberSlam® averages 5.0 from 7 ratings.

### Do Foundations Memory Work C3 or NumberSlam® have ads?

Neither Foundations Memory Work C3 nor NumberSlam® shows ads.

### Which is updated more often, Foundations Memory Work C3 or NumberSlam®?

Foundations Memory Work C3 ships an update every 16 months, and NumberSlam® every 6 days. Most recently, Foundations Memory Work C3 was updated on September 21, 2026 and NumberSlam® on June 1, 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.*