# IIT Sign Client vs E

The clearest difference is update cadence: E at every 2 weeks against IIT Sign Client's every 2 months. IIT Sign Client's advantage is iOS requirement (12.0 vs 15.6). 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.

IIT Sign Client ships an update every 2 months, E every 2 weeks. The most recent releases landed on September 15, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | IIT Sign Client | E |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 20 MB | 67 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IIT, JSC](https://appshunter.io/developer/1447134477) | [SILPO-FOOD LLC](https://appshunter.io/developer/1373717265) |

## What reviewers say

### IIT Sign Client

[App page](https://appshunter.io/ios/app/iit-sign-client/id1467005893)

This application facilitates the signing of data using private keys. It leverages network modules on signature servers for secure key storage and operation.

**Highlights:** Data signing functionality, Private key management, Network module integration, Signature server utilization, Secure key storage

**Features:** macOS Compatibility

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-picking/id6444901818)

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

**In-app purchases:** none


## Frequently asked questions

### Is IIT Sign Client free?

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

### Is E free?

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

### Do IIT Sign Client or E have ads?

Neither IIT Sign Client nor E shows ads.

### Which is updated more often, IIT Sign Client or E?

IIT Sign Client ships an update every 2 months, and E every 2 weeks. Most recently, IIT Sign Client was updated on September 15, 2026 and E on September 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.*