# C vs Instasign

The clearest difference is in-app purchases: C at none against Instasign's 4. C also leads on ads (none vs shown). Instasign's advantage is update cadence (every 10 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Instasign sells 4 one-off in-app purchases. C asks for nothing beyond the download.

C ships an update every 2 months, Instasign every 10 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | C | Instasign |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 67 MB | 148 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chiesi Farmaceutici Spa](https://appshunter.io/developer/549463160) | [Cyberneid](https://appshunter.io/developer/1513016785) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-life/id1552722672)

**Features:** Vision Pro support

**In-app purchases:** none


### Instasign

[App page](https://appshunter.io/ios/app/instasign/id1590675539)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ADS | $0.99 | one-time |
| TimeStamp | $3.99 | one-time |
| Personal Stamp or Signature | $3.99 | one-time |
| Enable all options | $4.99 | one-time |


## Frequently asked questions

### Is C free?

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

### Is Instasign free?

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

### Do C or Instasign have ads?

Instasign shows ads; C does not.

### Which is updated more often, C or Instasign?

C ships an update every 2 months, and Instasign every 10 days. Most recently, C was updated on October 29, 2026 and Instasign on October 30, 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.*