# t vs OSLA

The clearest difference is update cadence: OSLA at daily against t's every 2 months. 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.

t ships an update every 2 months, OSLA daily. The most recent releases landed on October 13, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | t | OSLA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (116 ratings)](https://appshunter.io/ios/app/tsimulator-app/id955568377/reviews)** | — |
| Number of ratings | **116** | — |
| Positive reviews | 42.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | — |
| Size | 31 MB | 19 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tandem Diabetes Care, Inc.](https://appshunter.io/developer/955568376) | [Chun-Huei Liu](https://appshunter.io/developer/1657411874) |

## What reviewers say

### t

[App page](https://appshunter.io/ios/app/tsimulator-app/id955568377)

Explore the features of an insulin pump's touchscreen interface without needing a prescription. This app is ideal for individuals with diabetes, their caregivers, or healthcare professionals to understand pump functionality.

**Highlights:** Explore touchscreen interface, Demonstrates pump features, No prescription required, Educational tool, Mobile device compatible

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great for education and training
- 👍 Realistic pump interface replica
- 👍 Useful for pre-pump decision making
- 👍 Easy to use and understand
- 👍 Helpful for understanding the pump

**What reviewers complain about**

- 🐛 Simulator not interactive
- 🐛 Doesn't simulate real-world issues (occlusions)
- 🐛 Lacks confirmation screens and alarms
- 🐛 Not a true simulation of pump usage
- 🐛 Only shows basic functions

**Reported bugs**

- App won't open once downloaded
- Simulator crashes on launch
- App broken on iOS 12
- Simulator app broken on iOS 12
- Simulator crashes as soon as app is open

**Requested features**

- Actual app to control and manage the pump
- App available in Canada/Europe
- Display beep noises for alerts
- Simulate real-world issues like occlusions
- Ability to simulate changing the pump


### OSLA

[App page](https://appshunter.io/ios/app/osla/id6777434206)

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

**In-app purchases:** none


## Frequently asked questions

### Is t free?

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

### Is OSLA free?

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

### Do t or OSLA have ads?

Neither t nor OSLA shows ads.

### Which is updated more often, t or OSLA?

t ships an update every 2 months, and OSLA daily. Most recently, t was updated on October 13, 2026 and OSLA on September 18, 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.*