Comparison

Countdown vs Flex Calculators

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

Head to head
About

Countdown

Track upcoming events with a beautifully designed countdown. Offers free basic features and a premium upgrade for unlimited events, widgets, and an ad-free experience. Perfect for anticipating special moments.

Highlights
  • Event countdowns
  • Customizable widgets
  • Smart reminders
  • Stylish backgrounds
  • Icon library
  • Unlimited events (Premium)
Features
Read full description

This app started as a countdown I made for my family. Hello, my name is Sergei. I’m the solo developer behind Events. In the spring of 2025, I found out I was going to be a father for the second time. I was so excited that I kept checking how much time was left until the baby arrived. But none of the apps I tried had a widget that was both beautiful and free. So I built one – Events, an app that helps you track the time until the moments you wait for. It combines thoughtful design with real affordability. Free version includes: - 3 events + 1 widget, up to 74 icons - Stylish backgrounds, notifications, and smart reminders Premium version adds: - Unlimited events & widgets - 800+ icons - Ad-free experience - One-time payment → lifetime access If you find Events useful, please leave a review and tap 5 stars – it means a lot. Share the app with friends and family if you think they might like it. And if you run into any issues or have an idea to improve it, I’d love to hear from you. Thank you for your time. Enjoy Events! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

About

Flex Calculators

Features
Read full description

Flex Calculators is a powerful all-in-one calculator app built for everyday problems and advanced math. Use it as your daily calculator, then switch to specialized tools for equations, calculus, statistics, finance, time, and conversions. Key features: - Scientific calculator - Fast expression input and real-time result preview - History support for quick reuse - Configurable angle mode (degrees/radians) - Real-only or complex result handling - Advanced math tools - Equation solver - System of equations and system of inequalities - Matrix calculator - Vector calculator - Derivatives and integrals - Statistics and distributions - Value table and proportion tools - Number base converter - Unit converter - Convert across many categories including: length, mass, area, volume, temperature, time, speed, force, pressure, energy, power, electrical, light, sound, data, performance, chemistry, and biology - Daily life calculators - Currency converter - Energy/fuel cost calculator - BMI/body index calculator - Loan payment calculator - Savings calculator - Date calculator - World hour/time-zone tool - Personalization and display controls - Light, dark, or system theme - Custom theme color - Multi-language interface - Decimal precision setting - Number formatting options (including thousand separators) - Ads and purchase - Banner/interstitial ads may be shown - One-time purchase option to remove ads Why users choose Flex Calculators: - One app for both basic and advanced calculations - Clean workflow for study, engineering, and daily finance tasks - Practical tools that reduce the need to install multiple calculator apps Whether you need quick arithmetic, equation solving, conversions, or planning daily expenses, Flex Calculators helps you solve it faster.

Screenshots

Countdown4 screens
Flex Calculators4 screens

Verdict

The call

The clearest difference is iOS requirement: Flex Calculators at 15.1 against Countdown's 18.0. On price, update cadence, ads and in-app purchases 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. Countdown sells 3 in-app purchases, starting at $0.99 per month and Flex Calculators sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Countdown ships an update weekly, Flex Calculators every 10 days. The most recent releases landed on July 4, 2026 and September 12, 2026 respectively.

Scorecard1 real difference · 9 level
Countdown versus Flex Calculators: the parameters behind the verdict, then further details
ParameterCountdownFlex Calculators
PriceFreeFree
Rating3.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyWeekly — betterEvery 10 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.1 — better
Further details — not scored
Size64 MB37 MB
Age rating4+4+
DeveloperSergei AinozerovAn Le

In-app purchases

3 purchases

Countdown

Subscriptions1
  • Monthly Plan$0.991 Month
One-time2
  • Premium Lifetime Offer$3.99
  • Premium Lifetime$7.99
1 purchases

Flex Calculators

One-time1
  • Remove Ads$4.99

Questions

Is Countdown free?
Countdown is free to download, with in-app purchases available.
Is Flex Calculators free?
Flex Calculators is free to download, with in-app purchases available.
Do Countdown or Flex Calculators have ads?
Neither Countdown nor Flex Calculators shows ads.
Which is updated more often, Countdown or Flex Calculators?
Countdown ships an update weekly, and Flex Calculators every 10 days. Most recently, Countdown was updated on July 4, 2026 and Flex Calculators on September 12, 2026.

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