Comparison

Changemonitor vs Quindecuple Calc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Changemonitor

Your Changedetection monitor

Free

🔧 Utilities

★ 4.52 ratingsView app →

About

Changemonitor

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

Read full description

Changemonitor brings changedetection.io to your iPhone. Monitor any website for changes and get instant push notifications when updates occur. KEY FEATURES • Track unlimited websites for changes • Instant push notifications with 12+ sound options • Visual change comparison with snapshots • 30-day history charts showing update patterns • Home screen widgets • Search, tags, and custom icons • 14+ languages supported PERFECT FOR • Tracking price drops and restocks • Monitoring competitor websites • Following news and content updates • Watching job postings and listings Requires a changedetection.io instance (self-hosted or hosted service).

About

Quindecuple Calc

Features

Read full description

Display 15 calculators and perform calculations with each one.

Screenshots

Changemonitor4 screens

Quindecuple Calc1 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level

Changemonitor versus Quindecuple Calc: the parameters behind the verdict, then further details
Parameter	Changemonitor	Quindecuple Calc
Price	Free	Free
Rating	4.5 (2 ratings) — better	—
Positive reviews	14.3% of reviews	—
Number of ratings	2 — better	—
Update frequency	Every 9 days — better	Every 2 weeks
Ads	No — better	Yes
In-app purchases	Yes	No — better
Monetization	Free with in-app purchases	—
Devices	iPhone, iPad, Apple Watch	iPhone, iPad, iPod
Requires iOS	17.6	15.8.3 — better
Further details — not scored
Size	37 MB	36 MB
Age rating	4+	4+
Developer	Rob Mulder	Hideaki Uchikoshi

In-app purchases

4 purchases

Changemonitor

Subscriptions3

Weekly Pro user$0.997 Days
Monthly Pro user$1.991 Month
Yearly Pro user$17.991 Year

One-time1

Pro user$8.99

None

Quindecuple Calc

No in-app purchases

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.