Comparison

Reminder & Countdown Pro vs Quel

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

Head to head
About

Reminder & Countdown Pro

Organize tasks, projects, and events with a distraction-free interface. Customize alerts, icons, and backgrounds to suit your needs. Sync across devices and secure your data with biometric authentication.

Highlights
  • Distraction-free task management
  • Customizable event alerts
  • Icon, background, and sound customization
  • Date, time, and repetition settings
  • iCloud sync across devices
  • Biometric app locking
  • iOS 14 home screen widgets
Features
Read full description

Reminder Pro is designed to manage your tasks, projects, and anything else you want to keep track of in really easy way taking away distraction and various shiny things that often lead us off course of whatever it is we’re trying to do. Reminder Pro highlights: ▸ Specify the event title. ▸ Assign default or custom category. ▸ Adjust icon, background, sound, time of alerts, font and text color. ▸ Set up date and time, duration, repetition, and units of countdown time. ▸ Add an optional description. ▸ Sort events by date, title, category or custom. ▸ Show or hide icons of the events. ▸ Set up events default values. ▸ Manage categories of the events. ▸ Import data from Address book, iCal, Reminders. ▸ Sync events between devices via iCloud. ▸ Show a badge number on the app’s icon. ▸ Switch between the old UI and the new UI. ▸ Locking / Unlocking the app using Touch & Face ID. ▸ IOS 14 home screen widgets. ▸ Run in the background. Information on events comes in a nicely-wrapped card which you can create by yourself, just open an event and swipe left or right to pick a screen and arrange custom boxes to fit your needs. Additionally, the app is complemented with excellent sharing options which give you an opportunity to share your reminders with the world via Email, Facebook, Twitter and even more.

About

Quel

Features
Read full description

Quel is your all-in-one engineering toolkit for instrumentation and controls. Designed for process engineers, control engineers, and instrumentation specialists, Quel brings powerful sizing and calculation tools into one streamlined app. Whether you're working on valves, orifice plates, or temperature sensors, Quel helps you size, calculate, and verify with speed and accuracy. KEY FEATURES • Control Valve Sizing – Quickly determine Cv, flow conditions, and check for subcritical or critical operation. • Valve Performance Calculator – Evaluate installed gain, rangeability, and operating point across the full stroke range. • Orifice Plate Sizing – Built-in ISO 5167 calculations for DP, Beta ratio, and flowrate in engineering units. • Temperature Sensors – RTD and thermocouple resistance and millivolt reference tables for common sensor types. • Unit Conversions – Instant conversions across pressure, temperature, flow, and volume to simplify day-to-day calculations. • Save & Export – Save calculation results to history, export as PDF or text for documentation and field reports. • Engineering References – Quick guides and formulas used in the field for sizing and troubleshooting. WHY QUEL? • Fast & Reliable – Save time in the field or office with ready-to-use sizing tools. • Accurate – Built around standard engineering methods (ISA, IEC, API, ISO, ASME). • Practical – Designed by engineers, for engineers, with workflows that match real projects. • Portable – A professional-grade toolkit in your pocket, whether you're commissioning, troubleshooting, or reviewing designs. With Quel, you work smarter and more confidently on process control projects, knowing your sizing and calculations are consistent with industry standards.

Screenshots

Reminder & Countdown Pro4 screens
Quel4 screens

Verdict

The call

The clearest difference is price: Quel at Free against Reminder & Countdown Pro's $1.99. Reminder & Countdown Pro's advantage is in-app purchases (none vs 3). On update cadence, ads, device support and iOS requirement 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

Quel is free to download; Reminder & Countdown Pro costs $1.99 up front. Quel sells 3 in-app purchases, starting at $9.99 per month. Reminder & Countdown Pro asks for nothing beyond the download.

UpkeepUpdate frequency

Reminder & Countdown Pro ships an update every 9 days, Quel every 5 days. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
Reminder & Countdown Pro versus Quel: the parameters behind the verdict, then further details
ParameterReminder & Countdown ProQuel
Price$1.99Free — better
Rating4.8 (3.3K ratings) — better—
Positive reviews87.7% of reviews—
Number of ratings3.3K — better—
Update frequencyEvery 9 daysEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.6 — better
Further details — not scored
Size41 MB7 MB
Age rating4+4+
DeveloperSergey AstakhovGuillermo Alvarado

In-app purchases

None

Reminder & Countdown Pro

No in-app purchases

3 purchases

Quel

Subscriptions2
  • Quel Monthly Plan$9.991 Month
  • Quel Yearly Plan$69.991 Year
One-time1
  • Full Access$4.99

Questions

Is Reminder & Countdown Pro free?
Reminder & Countdown Pro costs $1.99, with no in-app purchases.
Is Quel free?
Quel is free to download, with in-app purchases available.
Do Reminder & Countdown Pro or Quel have ads?
Neither Reminder & Countdown Pro nor Quel shows ads.
Which is updated more often, Reminder & Countdown Pro or Quel?
Reminder & Countdown Pro ships an update every 9 days, and Quel every 5 days. Most recently, Reminder & Countdown Pro was updated on November 1, 2026 and Quel on October 28, 2026.

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