# Duelle vs TwinLog

The clearest difference is in-app purchases: TwinLog at none against Duelle's 1. TwinLog also leads on update cadence (every 3 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Duelle sells 1 in-app purchase, starting at $12.99 per month. TwinLog asks for nothing beyond the download.

Duelle ships an update every 4 months, TwinLog every 3 weeks. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Duelle | TwinLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 29 MB | 30 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MaterniFlow, INC](https://appshunter.io/developer/1895862832) | [David Gormez](https://appshunter.io/developer/6776255674) |

## What reviewers say

### Duelle

[App page](https://appshunter.io/ios/app/duelle/id6764646683)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Duelle Premium | $12.99 | per month |


### TwinLog

[App page](https://appshunter.io/ios/app/twinlog-baby-tracker/id6776255672)

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

**In-app purchases:** none


## Frequently asked questions

### Is Duelle free?

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

### Is TwinLog free?

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

### Do Duelle or TwinLog have ads?

Neither Duelle nor TwinLog shows ads.

### Which is updated more often, Duelle or TwinLog?

Duelle ships an update every 4 months, and TwinLog every 3 weeks. Most recently, Duelle was updated on October 17, 2026 and TwinLog on October 6, 2026.

---

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