# Nidus Notes vs CalibratedNotes

The clearest difference is in-app purchases: Nidus Notes at none against CalibratedNotes's 1. CalibratedNotes's advantage is iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CalibratedNotes sells 1 in-app purchase, starting at $2.99 per month. Nidus Notes asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on September 9, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Nidus Notes | CalibratedNotes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | Every 2 days |
| Size | 6 MB | 50 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gleipnir LLC](https://appshunter.io/developer/1813202167) | [AIDEN JASON SEXTON](https://appshunter.io/developer/6790957568) |

## What reviewers say

### Nidus Notes

[App page](https://appshunter.io/ios/app/nidus-notes/id6745621956)

**Features:** macOS Compatibility

**In-app purchases:** none


### CalibratedNotes

[App page](https://appshunter.io/ios/app/calibratednotes/id6790957566)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CalibratedNotes Premium | $2.99 | per month |


## Frequently asked questions

### Is Nidus Notes free?

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

### Is CalibratedNotes free?

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

### Do Nidus Notes or CalibratedNotes have ads?

Neither Nidus Notes nor CalibratedNotes shows ads.

### Which is updated more often, Nidus Notes or CalibratedNotes?

Nidus Notes ships an update every 2 days, and CalibratedNotes every 2 days. Most recently, Nidus Notes was updated on September 9, 2026 and CalibratedNotes on September 12, 2026.

---

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