# CardStaq vs SoloWatermark

The clearest difference is update cadence: SoloWatermark at weekly against CardStaq's every 3 months. SoloWatermark also leads on iOS requirement (16.4 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CardStaq sells 1 one-off in-app purchase and SoloWatermark sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

CardStaq ships an update every 3 months, SoloWatermark weekly. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CardStaq | SoloWatermark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 4 MB | 74 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mark van Linden](https://appshunter.io/developer/1877654785) | [JUNICHI HASHIMOTO](https://appshunter.io/developer/1609225560) |

## What reviewers say

### CardStaq

[App page](https://appshunter.io/ios/app/cardstaq/id6760197642)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Cards | $2.99 | one-time |


### SoloWatermark

[App page](https://appshunter.io/ios/app/solowatermark/id6788365371)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Membership | $1.99 | per month |
| Premium Plan 1 Year | $11.99 | per year |


## Frequently asked questions

### Is CardStaq free?

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

### Is SoloWatermark free?

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

### Do CardStaq or SoloWatermark have ads?

Neither CardStaq nor SoloWatermark shows ads.

### Which is updated more often, CardStaq or SoloWatermark?

CardStaq ships an update every 3 months, and SoloWatermark weekly. Most recently, CardStaq was updated on October 28, 2026 and SoloWatermark on October 24, 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.*