# Changemonitor vs Quindecuple Calc

The clearest difference is in-app purchases: Quindecuple Calc at none against Changemonitor's 4. Quindecuple Calc also leads on iOS requirement (15.8.3 vs 17.6). Changemonitor's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Changemonitor sells 4 in-app purchases, starting at $0.99 per 7 days. Quindecuple Calc asks for nothing beyond the download.

Changemonitor ships an update every 9 days, Quindecuple Calc every 2 weeks. The most recent releases landed on October 2, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Changemonitor | Quindecuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/changemonitor/id6473832284/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 37 MB | 36 MB |
| Requires iOS | 17.6 | **15.8.3** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rob Mulder](https://appshunter.io/developer/1511132604) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Changemonitor

[App page](https://appshunter.io/ios/app/changemonitor/id6473832284)

This utility app allows you to monitor any website for changes and receive instant push notifications when updates are detected. It offers visual change comparison, history charts, and home screen widgets for easy tracking.

**Highlights:** Track unlimited websites, Instant push notifications, Visual change comparison, 30-day history charts, Home screen widgets, Multi-language support

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro user | $0.99 | per 7 days |
| Monthly Pro user | $1.99 | per month |
| Yearly Pro user | $17.99 | per year |
| Pro user | $8.99 | one-time |


### Quindecuple Calc

[App page](https://appshunter.io/ios/app/quindecuple-calc/id6742271873)

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

**In-app purchases:** none


## Frequently asked questions

### Is Changemonitor free?

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

### Is Quindecuple Calc free?

Quindecuple Calc is free to download, with no in-app purchases.

### Do Changemonitor or Quindecuple Calc have ads?

Quindecuple Calc shows ads; Changemonitor does not.

### Which is updated more often, Changemonitor or Quindecuple Calc?

Changemonitor ships an update every 9 days, and Quindecuple Calc every 2 weeks. Most recently, Changemonitor was updated on October 2, 2026 and Quindecuple Calc on October 17, 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.*