# RotStop vs SYSTEM // ZERO

The clearest difference is update cadence: RotStop at every 3 days against SYSTEM // ZERO's every 3 weeks. SYSTEM // ZERO's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RotStop sells 3 in-app purchases, starting at $6.99 per 7 days and SYSTEM // ZERO sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

RotStop ships an update every 3 days, SYSTEM // ZERO every 3 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | RotStop | SYSTEM // ZERO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/rotstop-screen-time-blocker/id6758160146/reviews)** | — |
| Number of ratings | **9** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | Subscription | — |
| Size | 45 MB | 60 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [API Media Inc.](https://appshunter.io/developer/1785442401) | [Raushan Nimatov](https://appshunter.io/developer/1888973196) |

## What reviewers say

### RotStop

[App page](https://appshunter.io/ios/app/rotstop-screen-time-blocker/id6758160146)

This app helps you reclaim focus and improve productivity by gamifying screen time management. It uses a credit system where you earn points for offline activities to unlock distracting apps, encouraging healthier digital habits.

**Highlights:** Credit Economy for earning unlock time, Brain Score for mental clarity tracking, Gauntlet Unlock for mindful unblocking, App Shields for instant category blocking, Performance History reports, Avatar evolution based on habits

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited (1 Week) | $6.99 | per 7 days |
| Unlimited (Limited Time Offer) | $24.99 | per year |
| Unlimited | $39.99 | per year |


### SYSTEM // ZERO

[App page](https://appshunter.io/ios/app/system-zero/id6801821275)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knight Protocol System Pack | $9.99 | one-time |
| Solo Level Up System Pack | $9.99 | one-time |
| Mass Build | $24.99 | one-time |
| Fat Loss Protocol | $24.99 | one-time |
| Physique Maintenance | $24.99 | one-time |


## Frequently asked questions

### Is RotStop free?

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

### Is SYSTEM // ZERO free?

SYSTEM // ZERO is free to download, with in-app purchases available.

### Do RotStop or SYSTEM // ZERO have ads?

Neither RotStop nor SYSTEM // ZERO shows ads.

### Which is updated more often, RotStop or SYSTEM // ZERO?

RotStop ships an update every 3 days, and SYSTEM // ZERO every 3 weeks. Most recently, RotStop was updated on October 31, 2026 and SYSTEM // ZERO on October 31, 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.*