# Tandem t vs Catchtrial ePro

The clearest difference is rating: Catchtrial ePro at 5.0 against Tandem t's 3.1. Catchtrial ePro also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). Tandem t's advantage is ratings volume (2.2K vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Catchtrial ePro holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Tandem t has 2.2K ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Tandem t | Catchtrial ePro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (2.2K ratings)](https://appshunter.io/ios/app/tandem-tslim-mobile-app/id1455916023/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/catchtrial-epro/id1490097635/reviews)** |
| Number of ratings | **2.2K** | 1 |
| Positive reviews | 36.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 157 MB | 61 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tandem Diabetes Care, Inc.](https://appshunter.io/developer/955568376) | [Meditrial Europe Ltd](https://appshunter.io/developer/958224235) |

## What reviewers say

### Tandem t

[App page](https://appshunter.io/ios/app/tandem-tslim-mobile-app/id1455916023)

This app acts as a smartphone companion for a specific insulin pump, allowing users to deliver insulin doses and view pump data remotely. It provides discreet access to essential information and notifications, enhancing convenience for pump users.

**Highlights:** Deliver bolus from smartphone, Discreet secondary pump display, View pump data and notifications, Wirelessly upload therapy data, Smartphone language support

**In-app purchases:** none

**What reviewers like**

- 🚀 Convenient mobile bolus
- 📊 Helpful data visualization
- 🤳 Discreet pump management
- 🔋 Reasonable battery impact
- 🎉 Game-changing technology

**What reviewers complain about**

- 🔌 Frequent connection issues
- 🕰️ Annoying time mismatch alerts
- 🔒 Limited pump control
- 🔍 Missing key features (extended bolus, alarms)
- 🐛 Buggy and unstable at times

**Reported bugs**

- App crashes on launch
- Pump battery draining rapidly
- Glucose data not syncing properly
- Repeated connection losses

**Requested features**

- Add extended bolus capability
- Allow clearing of pump alarms from app
- Integrate with Apple Health/Watch
- Expand data history and customization
- Improve app stability and reliability


### Catchtrial ePro

[App page](https://appshunter.io/ios/app/catchtrial-epro/id1490097635)

This app allows clinical trial participants to conveniently report their data from home using their smartphone or tablet. It provides timely surveys and diaries through an easy-to-use interface, ensuring data accuracy and secure transmission to clinical trial databases.

**Highlights:** Home-based data reporting, Timely surveys and diaries, Step-by-step questionnaire interface, Secure data transmission, Offline data collection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tandem t free?

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

### Is Catchtrial ePro free?

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

### Which has better reviews, Tandem t or Catchtrial ePro?

Catchtrial ePro is rated higher. Tandem t averages 3.1 out of 5 from 2.2K ratings, while Catchtrial ePro averages 5.0 from 1 ratings.

### Do Tandem t or Catchtrial ePro have ads?

Neither Tandem t nor Catchtrial ePro shows ads.

### Which is updated more often, Tandem t or Catchtrial ePro?

Tandem t ships an update every 2 months, and Catchtrial ePro every 2 months. Most recently, Tandem t was updated on November 6, 2026 and Catchtrial ePro 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.*