# Clearsign vs iSystem

The clearest difference is in-app purchases: iSystem at none against Clearsign's 6. iSystem also leads on update cadence (every 2 days vs every 2 weeks) and iOS requirement (13.4 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Clearsign sells 6 in-app purchases, starting at $7.99 per 7 days. iSystem asks for nothing beyond the download.

Clearsign ships an update every 2 weeks, iSystem every 2 days. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Clearsign | iSystem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (26 ratings)](https://appshunter.io/ios/app/clearsign-sign-documents-and-ai/id6736632289/reviews)** | — |
| Number of ratings | **26** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 115 MB | 29 MB |
| Requires iOS | 17.0 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Revinade AB](https://appshunter.io/developer/1139689087) | [ISD Corp](https://appshunter.io/developer/1427269446) |

## What reviewers say

### Clearsign

[App page](https://appshunter.io/ios/app/clearsign-sign-documents-and-ai/id6736632289)

Effortlessly sign documents and gain peace of mind with AI-powered contract analysis. Upload handwritten signatures for a professional touch. Get clear, structured insights and smart summaries to understand agreements better.

**Highlights:** Effortless e-signatures, AI document analysis, Identify potential risks, Ask custom questions about documents, Structured document insights, Smart summaries

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $7.99 | per 7 days |
| premium | $9.99 | per 7 days |
| Weekly Pro | $9.99 | per 7 days |
| Monthly Premium | $19.99 | per month |
| Yearly Premium | $49.99 | per year |
| Yearly Premium | $69.99 | per year |


### iSystem

[App page](https://appshunter.io/ios/app/isystem/id6737794984)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Clearsign free?

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

### Is iSystem free?

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

### Do Clearsign or iSystem have ads?

Neither Clearsign nor iSystem shows ads.

### Which is updated more often, Clearsign or iSystem?

Clearsign ships an update every 2 weeks, and iSystem every 2 days. Most recently, Clearsign was updated on October 30, 2026 and iSystem on November 4, 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.*