# Viva Complex vs LogFast

The clearest difference is in-app purchases: Viva Complex at none against LogFast's 2. LogFast's advantage is update cadence (weekly vs every 16 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. LogFast sells 2 in-app purchases, starting at $3.99 per month. Viva Complex asks for nothing beyond the download.

Viva Complex ships an update every 16 months, LogFast weekly. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Viva Complex | LogFast |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Weekly** |
| Size | 128 MB | 49 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gym Realm Technology AD](https://appshunter.io/developer/1446254637) | [Emanuil Mladenov](https://appshunter.io/developer/1884149036) |

## What reviewers say

### Viva Complex

[App page](https://appshunter.io/ios/app/viva-complex/id6475991923)

**In-app purchases:** none


### LogFast

[App page](https://appshunter.io/ios/app/logfast-meal-planner/id6760369326)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $3.99 | per month |
| Anual Plan | $17.99 | per year |


## Frequently asked questions

### Is Viva Complex free?

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

### Is LogFast free?

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

### Do Viva Complex or LogFast have ads?

Neither Viva Complex nor LogFast shows ads.

### Which is updated more often, Viva Complex or LogFast?

Viva Complex ships an update every 16 months, and LogFast weekly. Most recently, Viva Complex was updated on September 18, 2026 and LogFast on September 13, 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.*