# VTE Calc vs Xigma Diary

The clearest difference is in-app purchases: Xigma Diary at none against VTE Calc's 1. VTE Calc's advantage is update cadence (every 2 days vs every 22 months) and iOS requirement (9.0 vs 13.4). On price, ads and device support there is nothing between them.

Both are free to download. VTE Calc sells 1 one-off in-app purchase. Xigma Diary asks for nothing beyond the download.

VTE Calc ships an update every 2 days, Xigma Diary every 22 months. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | VTE Calc | Xigma Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/vte-calc/id1335332895/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 22 months |
| Monetization | Free | — |
| Size | 20 MB | 24 MB |
| Requires iOS | **9.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Lindum Medical Ltd](https://appshunter.io/developer/1092857686) | [Mednetix Limited](https://appshunter.io/developer/1560486564) |

## What reviewers say

### VTE Calc

[App page](https://appshunter.io/ios/app/vte-calc/id1335332895)

This medical app provides quick access to common scoring systems for calculating the risk of deep venous thrombosis (DVT) or pulmonary embolism (PE). It includes Wells' scores for DVT and PE, the PERC score, and a built-in creatinine clearance calculator for administering low molecular weight heparins.

**Highlights:** Wells' score for DVT, Wells' score for PE, PERC score, Creatinine clearance calculator, Risk assessment tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VTE Calc - remove advertising | $0.99 | one-time |


### Xigma Diary

[App page](https://appshunter.io/ios/app/xigma-diary/id1560486562)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VTE Calc free?

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

### Is Xigma Diary free?

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

### Do VTE Calc or Xigma Diary have ads?

Neither VTE Calc nor Xigma Diary shows ads.

### Which is updated more often, VTE Calc or Xigma Diary?

VTE Calc ships an update every 2 days, and Xigma Diary every 22 months. Most recently, VTE Calc was updated on October 9, 2026 and Xigma Diary on October 3, 2026.

---

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