# Countdown vs Flex Calculators

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.

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.

Countdown ships an update weekly, Flex Calculators every 10 days. Both last shipped on October 1, 2026.

## The numbers

| Metric | Countdown | Flex Calculators |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/countdown-events-and-widgets/id6748964596/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | Freemium | — |
| Size | 64 MB | 37 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sergei Ainozerov](https://appshunter.io/developer/1815335265) | [An Le](https://appshunter.io/developer/1863975090) |

## What reviewers say

### Countdown

[App page](https://appshunter.io/ios/app/countdown-events-and-widgets/id6748964596)

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:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |
| Premium Lifetime Offer | $3.99 | one-time |
| Premium Lifetime | $7.99 | one-time |


### Flex Calculators

[App page](https://appshunter.io/ios/app/flex-calculators/id6761326502)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked 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 October 1, 2026 and Flex Calculators on October 1, 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.*