# Smoke Detox vs Necessary Devil

The clearest difference is in-app purchases: Necessary Devil at none against Smoke Detox's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Smoke Detox sells 1 one-off in-app purchase. Necessary Devil asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 16, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Smoke Detox | Necessary Devil |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free |
| Size | 9 MB | 40 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [TRADEXPERT INNOVATIONS LLC](https://appshunter.io/developer/1795651769) | [Necessary Devil](https://appshunter.io/developer/1826779719) |

## What reviewers say

### Smoke Detox

[App page](https://appshunter.io/ios/app/smoke-detox/id6742410587)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access Relax Subscription | $0.99 | one-time |


### Necessary Devil

[App page](https://appshunter.io/ios/app/necessary-devil/id6748644766)

Transform your daily walks into engaging, social fitness experiences. Participate in solo or team step challenges, track your progress in real-time, and connect with others to stay motivated. It's designed to make fitness fun and rewarding for individuals and groups.

**Highlights:** Daily, weekly, and custom step challenges, Solo or team participation, Real-time leaderboard and progress tracking, Connect with friends and groups, Sync with Google Fit and fitness trackers

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smoke Detox free?

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

### Is Necessary Devil free?

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

### Do Smoke Detox or Necessary Devil have ads?

Neither Smoke Detox nor Necessary Devil shows ads.

### Which is updated more often, Smoke Detox or Necessary Devil?

Smoke Detox ships an update every 2 months, and Necessary Devil every 2 months. Most recently, Smoke Detox was updated on October 16, 2026 and Necessary Devil on October 19, 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.*