# Countdown vs Quantum AI

The clearest difference is price: Quantum AI at Free against Countdown's $9.99. Quantum AI also leads on update cadence (every 4 days vs every 7 months) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Quantum AI is free to download; Countdown costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Countdown ships an update every 7 months, Quantum AI every 4 days. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Countdown | Quantum AI |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 days** |
| Monetization | Paid | — |
| Size | 2 MB | 49 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [jekyung sung](https://appshunter.io/developer/1068338242) | [Nadiia Holdina](https://appshunter.io/developer/1872492242) |

## What reviewers say

### Countdown

[App page](https://appshunter.io/ios/app/countdown-bills-and-timer-pro/id1003581824)

Manage events, recurring monthly expenses, and countdowns to important dates. Efficiently track multiple timers for various activities. Stay organized with timely notifications for upcoming events and financial obligations.

**Highlights:** Efficient event and expense management, Automatic repeating monthly expenses, Countdown to important dates, Multiple timer management, Timely notifications for events and expenses, List view of upcoming events and expenses

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

**In-app purchases:** none


### Quantum AI

[App page](https://appshunter.io/ios/app/quantum-ai-conquer-your-goals/id6758353749)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Countdown free?

Countdown costs $9.99, with no in-app purchases.

### Is Quantum AI free?

Quantum AI is free to download, with no in-app purchases.

### Do Countdown or Quantum AI have ads?

Neither Countdown nor Quantum AI shows ads.

### Which is updated more often, Countdown or Quantum AI?

Countdown ships an update every 7 months, and Quantum AI every 4 days. Most recently, Countdown was updated on October 8, 2026 and Quantum AI on October 4, 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.*