# Harm Reduction Sisters vs Mode Zero

The clearest difference is in-app purchases: Harm Reduction Sisters at none against Mode Zero's 2. Mode Zero's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mode Zero sells 2 in-app purchases, starting at $4.99 per month. Harm Reduction Sisters asks for nothing beyond the download.

Harm Reduction Sisters ships an update every 3 months, Mode Zero every 3 weeks. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Harm Reduction Sisters | Mode Zero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.4 (5 ratings)](https://appshunter.io/ios/app/mode-zero-sobriety-tracker/id6762463867/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 8 MB | 68 MB |
| Requires iOS | **17.0** | 17.2 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Harm Reduction Sisters](https://appshunter.io/developer/1786415621) | [ModeZero LLC](https://appshunter.io/developer/1894242701) |

## What reviewers say

### Harm Reduction Sisters

[App page](https://appshunter.io/ios/app/harm-reduction-sisters/id6739639418)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mode Zero

[App page](https://appshunter.io/ios/app/mode-zero-sobriety-tracker/id6762463867)

A calm and focused recovery tracker to help you quit any habit, from substances to behaviors. It provides clear metrics on clean time, savings, and health improvements without pressure or shame. Track your progress with a daily pledge, journal, and milestone achievements.

**Highlights:** Track clean time to the second, Monitor physical and mental health improvements, Calculate savings from quitting habits, Daily pledge and streak history, Personal journal for reflections, Milestone achievements and bonus content, Optional shareable progress cards

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro \| Monthly | $4.99 | per month |
| Pro \| Yearly | $29.99 | per year |


## Frequently asked questions

### Is Harm Reduction Sisters free?

Harm Reduction Sisters is free to download, with no in-app purchases.

### Is Mode Zero free?

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

### Do Harm Reduction Sisters or Mode Zero have ads?

Neither Harm Reduction Sisters nor Mode Zero shows ads.

### Which is updated more often, Harm Reduction Sisters or Mode Zero?

Harm Reduction Sisters ships an update every 3 months, and Mode Zero every 3 weeks. Most recently, Harm Reduction Sisters was updated on October 10, 2026 and Mode Zero on October 14, 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.*