# Hunterdon County ESC vs Rondo

The clearest difference is in-app purchases: Hunterdon County ESC at none against Rondo's 5. Hunterdon County ESC also leads on iOS requirement (16.0 vs 26.0). Rondo's advantage is update cadence (every 4 days vs every 2 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Rondo sells 5 one-off in-app purchases. Hunterdon County ESC asks for nothing beyond the download.

Hunterdon County ESC ships an update every 2 months, Rondo every 4 days. The most recent releases landed on September 30, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Hunterdon County ESC | Rondo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rondo-prime-factorization/id6784029039/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 147 MB | 8 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Hunterdon County Educational Services Commission](https://appshunter.io/developer/1824714246) | [KEN TOMINAGA](https://appshunter.io/developer/975026926) |

## What reviewers say

### Hunterdon County ESC

[App page](https://appshunter.io/ios/app/hunterdon-county-esc/id6748236956)

**In-app purchases:** none


### Rondo

[App page](https://appshunter.io/ios/app/rondo-prime-factorization/id6784029039)

Explore the mathematical beauty of numbers through interactive, animated factorization diagrams. Watch numbers dance, hear their unique songs, and even visualize them in augmented reality. Discover the stories behind special numbers and personalize your experience with customizable palettes and sounds.

**Highlights:** Animated factorization diagrams, Augmented reality number visualization, Auditory representation of factors, Interactive number exploration, Field Guide for special numbers, Home screen and Apple Watch widgets, Customizable color palettes and sounds

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip a prime · 199 | $1.99 | one-time |
| Tip a prime · 499 | $4.99 | one-time |
| Rondo Pro | $4.99 | one-time |
| Tip a prime · 599 | $5.99 | one-time |
| Tip a prime · 1999 | $19.99 | one-time |


## Frequently asked questions

### Is Hunterdon County ESC free?

Hunterdon County ESC is free to download, with no in-app purchases.

### Is Rondo free?

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

### Do Hunterdon County ESC or Rondo have ads?

Neither Hunterdon County ESC nor Rondo shows ads.

### Which is updated more often, Hunterdon County ESC or Rondo?

Hunterdon County ESC ships an update every 2 months, and Rondo every 4 days. Most recently, Hunterdon County ESC was updated on September 30, 2026 and Rondo on October 16, 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.*