Comparison

Master Pay vs QI Calculator

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

Head to head

Visual Handwriting input

Free

🔧 Utilities

No ratingsView app →

About

Master Pay

Features

Read full description

Accede a contenido de los cursos desde la palma de tu mano, no te pierdas y mantén organizados videotutoriales y webinars, realiza pagos de tus mensualidades y mantente informado por medio de notificaciones en cualquier lugar.

About

QI Calculator

Features

Read full description

1. A calculator that fully conforms to handwriting habits, so you no longer need to master different input methods for calculating data 2. There may be some imperfections, but everyone can provide valuable feedback on the premise of promising not to require fees. 3. Pay attention to the use of the cursor 4. Terms of Use (EULA):https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ 5.Privacy Policy:http://www.iphonesir.com/privacypolicy.html

Screenshots

Master Pay4 screens

QI Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Master Pay at none against QI Calculator's 2. Master Pay also leads on iOS requirement (11.0 vs 15.0). On price, update cadence, ads 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. QI Calculator sells 2 one-off in-app purchases. Master Pay asks for nothing beyond the download.

UpkeepUpdate frequency

Master Pay ships an update fortnightly, QI Calculator every 3 weeks. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

Scorecard2 real differences · 4 level

Master Pay versus QI Calculator: the parameters behind the verdict, then further details
Parameter	Master Pay	QI Calculator
Price	Free	Free
Update frequency	Fortnightly — better	Every 3 weeks
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	11.0 — better	15.0
Further details — not scored
Size	68 MB	129 MB
Age rating	4+	4+
Developer	Parque Tecnologico	shouhui qi

In-app purchases

None

Master Pay

No in-app purchases

2 purchases

QI Calculator

One-time2

Theme$0.99
Theme Blue Sky$0.99

Questions

Is Master Pay free?

Master Pay is free to download, with no in-app purchases.

Is QI Calculator free?

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

Do Master Pay or QI Calculator have ads?

Neither Master Pay nor QI Calculator shows ads.

Which is updated more often, Master Pay or QI Calculator?

Master Pay ships an update fortnightly, and QI Calculator every 3 weeks. Most recently, Master Pay was updated on November 3, 2026 and QI Calculator on November 8, 2026.