# Crystal Disk vs TKS notice

The clearest difference is in-app purchases: Crystal Disk at none against TKS notice's 5. Crystal Disk also leads on iOS requirement (8.0 vs 14.0). TKS notice's advantage is update cadence (fortnightly vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. TKS notice sells 5 in-app purchases, starting at $4.49 per month. Crystal Disk asks for nothing beyond the download.

Crystal Disk ships an update every 6 weeks, TKS notice fortnightly. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Crystal Disk | TKS notice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Size | 86 MB | 69 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sunita Telecom Co.,Ltd.](https://appshunter.io/developer/1062645116) | [Dokokade Inc.](https://appshunter.io/developer/1609913393) |

## What reviewers say

### Crystal Disk

[App page](https://appshunter.io/ios/app/crystal-disk/id1249355611)

**Features:** macOS Compatibility

**In-app purchases:** none


### TKS notice

[App page](https://appshunter.io/ios/app/tks-notice/id1609913391)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plan 5 | $4.49 | per month |
| Plan 12 | $9.49 | per month |
| Plan 25 | $18.99 | per month |
| Plan 65 | $38.99 | per month |
| Plan 140 | $76.99 | per month |


## Frequently asked questions

### Is Crystal Disk free?

Crystal Disk is free to download, with no in-app purchases.

### Is TKS notice free?

TKS notice is free to download, with in-app purchases available.

### Do Crystal Disk or TKS notice have ads?

Neither Crystal Disk nor TKS notice shows ads.

### Which is updated more often, Crystal Disk or TKS notice?

Crystal Disk ships an update every 6 weeks, and TKS notice fortnightly. Most recently, Crystal Disk was updated on October 26, 2026 and TKS notice on November 3, 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.*