# ZEST Client vs Safous Agent

The clearest difference is update cadence: ZEST Client at every 3 weeks against Safous Agent's every 3 months. Safous Agent's advantage is iOS requirement (14.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ZEST Client ships an update every 3 weeks, Safous Agent every 3 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | ZEST Client | Safous Agent |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 25 MB | 48 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZEST Inc. (US)](https://appshunter.io/developer/1682277951) | [Internet Initiative Japan, Inc.](https://appshunter.io/developer/444664358) |

## What reviewers say

### ZEST Client

[App page](https://appshunter.io/ios/app/zest-client/id6447696283)

**In-app purchases:** none


### Safous Agent

[App page](https://appshunter.io/ios/app/safous-agent/id6478958567)

**In-app purchases:** none


## Frequently asked questions

### Is ZEST Client free?

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

### Is Safous Agent free?

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

### Do ZEST Client or Safous Agent have ads?

Neither ZEST Client nor Safous Agent shows ads.

### Which is updated more often, ZEST Client or Safous Agent?

ZEST Client ships an update every 3 weeks, and Safous Agent every 3 months. Most recently, ZEST Client was updated on October 25, 2026 and Safous Agent on October 25, 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.*