# OTOtron Home vs Calory Notes

The clearest difference is update cadence: Calory Notes at every 2 weeks against OTOtron Home's every 6 months. OTOtron Home's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

OTOtron Home ships an update every 6 months, Calory Notes every 2 weeks. The most recent releases landed on October 7, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | OTOtron Home | Calory Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Size | 510 MB | 25 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [BIOLUX INC.](https://appshunter.io/developer/1483444855) | [SUPERSTRING TECH K.K.](https://appshunter.io/developer/1890722482) |

## What reviewers say

### OTOtron Home

[App page](https://appshunter.io/ios/app/ototron-home/id1530529627)

**Features:** macOS Compatibility

**In-app purchases:** none


### Calory Notes

[App page](https://appshunter.io/ios/app/calory-notes/id6768356177)

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

**In-app purchases:** none


## Frequently asked questions

### Is OTOtron Home free?

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

### Is Calory Notes free?

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

### Do OTOtron Home or Calory Notes have ads?

Neither OTOtron Home nor Calory Notes shows ads.

### Which is updated more often, OTOtron Home or Calory Notes?

OTOtron Home ships an update every 6 months, and Calory Notes every 2 weeks. Most recently, OTOtron Home was updated on October 7, 2026 and Calory Notes on September 25, 2026.

---

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