# Trinity Open Day vs Fluid Ink Studio

The clearest difference is price: Trinity Open Day at Free against Fluid Ink Studio's $19.99. Trinity Open Day also leads on update cadence (every 2 months vs every 11 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Trinity Open Day is free to download; Fluid Ink Studio costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trinity Open Day ships an update every 2 months, Fluid Ink Studio every 11 months. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Trinity Open Day | Fluid Ink Studio |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Size | 57 MB | 37 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Trinity College Dublin Commercial](https://appshunter.io/developer/1583568942) | [SimTeCon GmbH](https://appshunter.io/developer/1761797043) |

## What reviewers say

### Trinity Open Day

[App page](https://appshunter.io/ios/app/trinity-open-day/id6470378702)

**Features:** Apple Wallet

**In-app purchases:** none


### Fluid Ink Studio

[App page](https://appshunter.io/ios/app/fluid-ink-studio/id6730121423)

**In-app purchases:** none


## Frequently asked questions

### Is Trinity Open Day free?

Trinity Open Day is free to download, with no in-app purchases.

### Is Fluid Ink Studio free?

Fluid Ink Studio costs $19.99, with no in-app purchases.

### Do Trinity Open Day or Fluid Ink Studio have ads?

Neither Trinity Open Day nor Fluid Ink Studio shows ads.

### Which is updated more often, Trinity Open Day or Fluid Ink Studio?

Trinity Open Day ships an update every 2 months, and Fluid Ink Studio every 11 months. Most recently, Trinity Open Day was updated on October 5, 2026 and Fluid Ink Studio on October 9, 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.*