# t vs iLet App

The clearest difference is rating: iLet App at 4.3 against t's 3.6. iLet App also leads on review sentiment (65% vs 42%). t's advantage is device support (3 vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iLet App holds the better App Store score, 4.3 against 3.6. Both are backed by a comparable volume of ratings — 116 and 115 respectively. Written reviews point the same way: 42% of t's written reviews are positive against 65% of iLet App's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | t | iLet App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (116 ratings)](https://appshunter.io/ios/app/tsimulator-app/id955568377/reviews) | **[4.3 (115 ratings)](https://appshunter.io/ios/app/ilet-app/id1553486890/reviews)** |
| Number of ratings | **116** | 115 |
| Positive reviews | 42.4% of reviews | **64.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 31 MB | 169 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tandem Diabetes Care, Inc.](https://appshunter.io/developer/955568376) | [BetaBionics](https://appshunter.io/developer/1395643778) |

## 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


### iLet App

[App page](https://appshunter.io/ios/app/ilet-app/id1553486890)

This app displays real-time data from an automated insulin delivery system, including glucose levels and trends. It supports data synchronization, reporting, and updates for the connected device, and allows sharing information with healthcare providers.

**Highlights:** Real-time glucose and trend display, Data synchronization and reporting, Device updates, Healthcare provider data sharing, Automated insulin dosing decisions, No carb counting required, Learns individual insulin needs

**In-app purchases:** none


## Frequently asked questions

### Is t free?

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

### Is iLet App free?

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

### Which has better reviews, t or iLet App?

iLet App is rated higher. t averages 3.6 out of 5 from 116 ratings, while iLet App averages 4.3 from 115 ratings.

### Do t or iLet App have ads?

Neither t nor iLet App shows ads.

### Which is updated more often, t or iLet App?

t ships an update every 2 months, and iLet App every 2 months. Most recently, t was updated on November 1, 2026 and iLet App on November 3, 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.*