# Countdown Timer vs Main Arc

The clearest difference is device support: Countdown Timer at 3 against Main Arc's 1. Countdown Timer also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Countdown Timer sells 3 in-app purchases, starting at $3.99 per month and Main Arc sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Countdown Timer ships an update weekly, Main Arc every 4 days. The most recent releases landed on September 26, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Countdown Timer | Main Arc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Size | 71 MB | 10 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Denys Koshman](https://appshunter.io/developer/1864985254) | [Denys Khomenko](https://appshunter.io/developer/6773156392) |

## What reviewers say

### Countdown Timer

[App page](https://appshunter.io/ios/app/countdown-timer-onedial/id6759490627)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OneDial Pro Monthly | $3.99 | per month |
| OneDial Pro Yearly | $29.99 | per year |
| OneDial Pro Lifetime | $59.99 | one-time |


### Main Arc

[App page](https://appshunter.io/ios/app/main-arc-winter-arc-tracker/id6806285592)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HabitMint Pro Weekly | $3.99 | per 7 days |
| HabitMint Pro Yearly | $24.99 | per year |
| HabitMint Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Countdown Timer free?

Countdown Timer is free to download, with in-app purchases available.

### Is Main Arc free?

Main Arc is free to download, with in-app purchases available.

### Do Countdown Timer or Main Arc have ads?

Neither Countdown Timer nor Main Arc shows ads.

### Which is updated more often, Countdown Timer or Main Arc?

Countdown Timer ships an update weekly, and Main Arc every 4 days. Most recently, Countdown Timer was updated on September 26, 2026 and Main Arc on October 16, 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.*