# 1С vs Контур.Диадок

The clearest difference is update cadence: Контур.Диадок at every 3 weeks against 1С's every 4 months. 1С's advantage is iOS requirement (13.0 vs 16.0). 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.

1С ships an update every 4 months, Контур.Диадок every 3 weeks. The most recent releases landed on September 1, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 1С | Контур.Диадок |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (35 ratings)](https://appshunter.io/ios/app/id1492422672/reviews)** |
| Number of ratings | — | **35** |
| Positive reviews | — | 54.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 123 MB | 102 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [1C-SOFT LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1188302931) | [SKB Kontur](https://appshunter.io/developer/417000920) |

## What reviewers say

### 1С

[App page](https://appshunter.io/ios/app/1/id1475739699)

**Features:** macOS Compatibility

**In-app purchases:** none


### Контур.Диадок

[App page](https://appshunter.io/ios/app/id1492422672)

This business application facilitates the exchange of legally significant electronic documents with counterparties and within an organization. Users can sign, reject, approve, and reject approvals for documents using an account created in the web version. Keep your organization's document flow accessible on the go and manage counterparty invitations and transaction details.

**Highlights:** Exchange legally significant electronic documents, Sign, reject, and approve documents, Manage counterparty invitations, Review transaction history and comments, Access document flow on mobile

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 1С free?

1С is free to download, with no in-app purchases.

### Is Контур.Диадок free?

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

### Do 1С or Контур.Диадок have ads?

Neither 1С nor Контур.Диадок shows ads.

### Which is updated more often, 1С or Контур.Диадок?

1С ships an update every 4 months, and Контур.Диадок every 3 weeks. Most recently, 1С was updated on September 1, 2026 and Контур.Диадок on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*