# iSign vs NestedClock

The clearest difference is in-app purchases: NestedClock at none against iSign's 12. NestedClock also leads on ads (none vs shown) and iOS requirement (16.4 vs 18.0). On price, update cadence and device support there is nothing between them.

Both are free to download. iSign sells 12 in-app purchases, starting at $4.99 per 7 days. NestedClock asks for nothing beyond the download.

iSign ships an update every 3 weeks, NestedClock monthly. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | iSign | NestedClock |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 58 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | +4 | 4+ |
| Developer | [PRODEKS](https://appshunter.io/developer/1711040618) | [NESTED TECHNOLOGY GROUP PTY LTD](https://appshunter.io/developer/6775723360) |

## 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 |


### NestedClock

[App page](https://appshunter.io/ios/app/nestedclock/id6775723358)

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

**In-app purchases:** none


## Frequently asked questions

### Is iSign free?

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

### Is NestedClock free?

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

### Do iSign or NestedClock have ads?

iSign shows ads; NestedClock does not.

### Which is updated more often, iSign or NestedClock?

iSign ships an update every 3 weeks, and NestedClock monthly. Most recently, iSign was updated on October 28, 2026 and NestedClock 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.*