# Event Countdown Tracker vs Stone Identifier AI Rock Scan

The clearest difference is in-app purchases: Event Countdown Tracker at none against Stone Identifier AI Rock Scan's 2. Stone Identifier AI Rock Scan's advantage is update cadence (fortnightly vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stone Identifier AI Rock Scan sells 2 in-app purchases, starting at $39.99 per year. Event Countdown Tracker asks for nothing beyond the download.

Event Countdown Tracker ships an update every 9 months, Stone Identifier AI Rock Scan fortnightly. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Event Countdown Tracker | Stone Identifier AI Rock Scan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Fortnightly** |
| Size | 8 MB | 26 MB |
| Requires iOS | 18.5 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ANDREW MARTYN BANNER](https://appshunter.io/developer/1785719851) | [Abdullah YILMAZ](https://appshunter.io/developer/1636324967) |

## What reviewers say

### Event Countdown Tracker

[App page](https://appshunter.io/ios/app/event-countdown-tracker/id6752301034)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stone Identifier AI Rock Scan

[App page](https://appshunter.io/ios/app/stone-identifier-ai-rock-scan/id6790352491)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stone ID Premium Yearly | $39.99 | per year |
| Stone ID Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is Event Countdown Tracker free?

Event Countdown Tracker is free to download, with no in-app purchases.

### Is Stone Identifier AI Rock Scan free?

Stone Identifier AI Rock Scan is free to download, with in-app purchases available.

### Do Event Countdown Tracker or Stone Identifier AI Rock Scan have ads?

Neither Event Countdown Tracker nor Stone Identifier AI Rock Scan shows ads.

### Which is updated more often, Event Countdown Tracker or Stone Identifier AI Rock Scan?

Event Countdown Tracker ships an update every 9 months, and Stone Identifier AI Rock Scan fortnightly. Most recently, Event Countdown Tracker was updated on October 6, 2026 and Stone Identifier AI Rock Scan on October 15, 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.*