# NullTrace vs DoublyCheck

The clearest difference is in-app purchases: NullTrace at none against DoublyCheck's 2. NullTrace also leads on update cadence (daily vs every 2 months) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. DoublyCheck sells 2 one-off in-app purchases. NullTrace asks for nothing beyond the download.

NullTrace ships an update daily, DoublyCheck every 2 months. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | NullTrace | DoublyCheck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 months |
| Size | 51 MB | 73 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [NullTrace LLC](https://appshunter.io/developer/1872799837) | [Manuel Caspari](https://appshunter.io/developer/1877704421) |

## What reviewers say

### NullTrace

[App page](https://appshunter.io/ios/app/nulltrace/id6758411859)

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

**In-app purchases:** none


### DoublyCheck

[App page](https://appshunter.io/ios/app/doublycheck-bitcoin-address/id6759260900)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee Tip | $2.99 | one-time |
| Breakfast Tip | $4.99 | one-time |


## Frequently asked questions

### Is NullTrace free?

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

### Is DoublyCheck free?

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

### Do NullTrace or DoublyCheck have ads?

Neither NullTrace nor DoublyCheck shows ads.

### Which is updated more often, NullTrace or DoublyCheck?

NullTrace ships an update daily, and DoublyCheck every 2 months. Most recently, NullTrace was updated on October 8, 2026 and DoublyCheck on September 30, 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.*