# iSign vs Contract Radar

The clearest difference is iOS requirement: Contract Radar at 16.1 against iSign's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. iSign sells 12 in-app purchases, starting at $4.99 per 7 days and Contract Radar sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

iSign ships an update every 3 weeks, Contract Radar every 5 weeks. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | iSign | Contract Radar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (49 ratings)](https://appshunter.io/ios/app/isign-sign-documents/id6748340697/reviews)** | — |
| Number of ratings | **49** | — |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 5 MB |
| Requires iOS | 18.0 | **16.1** |
| Devices | iPhone | iPhone |
| Age rating | +4 | 4+ |
| Developer | [PRODEKS](https://appshunter.io/developer/1711040618) | [玉丽 方](https://appshunter.io/developer/1882548746) |

## What reviewers say

### iSign

[App page](https://appshunter.io/ios/app/isign-sign-documents/id6748340697)

Effortlessly sign and manage your digital documents with an AI-powered signature generator. This tool allows you to create custom electronic signatures, sign PDFs, fill forms, and add annotations directly from your device for a streamlined workflow.

**Highlights:** AI-generated electronic signatures, Sign and export PDF files, Capture and digitize handwritten signatures, Fill interactive PDF forms, Add custom stamps and annotations, Cross-device accessibility

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium features (Weekly) | $4.99 | per 7 days |
| Premium features (Weekly) | $6.99 | per 7 days |
| Premium features (Weekly) | $6.99 | per 7 days |
| Premium features (Month) | $9.99 | per month |
| Premium features (Month) | $14.99 | per month |
| Premium features (Month) | $14.99 | per month |
| Premium features (Month) | $19.99 | per month |
| Premium features (Annual) | $49.99 | per year |
| Premium Year Access | $69.99 | per year |
| Premium Year Access | $69.99 | per year |
| Lifetime Access | Free | one-time |
| Lifetime Access | $119.99 | one-time |


### Contract Radar

[App page](https://appshunter.io/ios/app/contract-radar/id6760940660)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is iSign free?

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

### Is Contract Radar free?

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

### Do iSign or Contract Radar have ads?

Both iSign and Contract Radar show ads.

### Which is updated more often, iSign or Contract Radar?

iSign ships an update every 3 weeks, and Contract Radar every 5 weeks. Most recently, iSign was updated on October 17, 2026 and Contract Radar on October 10, 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.*