# Calmer OS vs OneLess

Calmer OS and OneLess are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Calmer OS | OneLess |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/oneless-decluttering-tool/id6785740348/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | — | Free |
| Size | 12 MB | 2 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Petr Betak](https://appshunter.io/developer/1775162907) | [BRANDON HAOYANG WANG](https://appshunter.io/developer/6780666346) |

## What reviewers say

### Calmer OS

[App page](https://appshunter.io/ios/app/calmer-os/id6737633514)

**Features:** macOS Compatibility

**In-app purchases:** none


### OneLess

[App page](https://appshunter.io/ios/app/oneless-decluttering-tool/id6785740348)

This app helps you declutter your home by focusing on removing just one item each day. It provides a simple way to track your progress, build a daily habit, and visualize your decluttering journey without overwhelming you.

**Highlights:** Frictionless daily logging, Habit tracking and streaks, Visual progress analytics, Gentle daily nudges, Privacy-first, on-device data

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

**In-app purchases:** none


## Frequently asked questions

### Is Calmer OS free?

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

### Is OneLess free?

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

### Do Calmer OS or OneLess have ads?

Neither Calmer OS nor OneLess shows ads.

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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.*