# Invisible Notes vs CarbonLink

The clearest difference is update cadence: CarbonLink at every 3 weeks against Invisible Notes's every 94 months. Invisible Notes's advantage is iOS requirement (9.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Invisible Notes ships an update every 94 months, CarbonLink every 3 weeks. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Invisible Notes | CarbonLink |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 94 months | **Every 3 weeks** |
| Size | 1 MB | 150 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mohannad Daghistany](https://appshunter.io/developer/846765571) | [Fiber tec private limited](https://appshunter.io/developer/1855061345) |

## What reviewers say

### Invisible Notes

[App page](https://appshunter.io/ios/app/invisible-notes/id916482961)

**Features:** macOS Compatibility

**In-app purchases:** none


### CarbonLink

[App page](https://appshunter.io/ios/app/carbonlink/id6755624599)

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

**In-app purchases:** none


## Frequently asked questions

### Is Invisible Notes free?

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

### Is CarbonLink free?

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

### Do Invisible Notes or CarbonLink have ads?

Neither Invisible Notes nor CarbonLink shows ads.

### Which is updated more often, Invisible Notes or CarbonLink?

Invisible Notes ships an update every 94 months, and CarbonLink every 3 weeks. Most recently, Invisible Notes was updated on October 3, 2026 and CarbonLink on October 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*