# S4_control vs Anchor

The clearest difference is in-app purchases: S4_control at none against Anchor's 1. S4_control also leads on iOS requirement (9.0 vs 17.0). Anchor's advantage is update cadence (weekly vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. Anchor sells 1 one-off in-app purchase. S4_control asks for nothing beyond the download.

S4_control ships an update every 9 months, Anchor weekly. The most recent releases landed on October 10, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | S4_control | Anchor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Weekly** |
| Size | 108 MB | 2 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [GUANDDONG TIANPU TECHNOLOGY GROUP CO.,LTD.](https://appshunter.io/developer/1637560013) | [Sahil Jain](https://appshunter.io/developer/1856599863) |

## What reviewers say

### S4_control

[App page](https://appshunter.io/ios/app/s4-control/id6532592331)

**Features:** macOS Compatibility

**In-app purchases:** none


### Anchor

[App page](https://appshunter.io/ios/app/anchor-screen-time-lock/id6788651878)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Anchor Full | $4.99 | one-time |


## Frequently asked questions

### Is S4_control free?

S4_control is free to download, with no in-app purchases.

### Is Anchor free?

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

### Do S4_control or Anchor have ads?

Neither S4_control nor Anchor shows ads.

### Which is updated more often, S4_control or Anchor?

S4_control ships an update every 9 months, and Anchor weekly. Most recently, S4_control was updated on October 10, 2026 and Anchor on October 20, 2026.

---

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