# Tandem Mobi® mobile app vs Bionic Circle

The clearest difference is rating: Bionic Circle at 4.8 against Tandem Mobi® mobile app's 3.3. Bionic Circle also leads on review sentiment (77% vs 39%) and iOS requirement (16.0 vs 18.0). Tandem Mobi® mobile app's advantage is ratings volume (220 vs 70). 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.

Bionic Circle holds the better App Store score, 4.8 against 3.3. Both are backed by a comparable volume of ratings — 220 and 70 respectively. Written reviews point the same way: 39% of Tandem Mobi® mobile app's written reviews are positive against 77% of Bionic Circle's.

Tandem Mobi® mobile app ships an update every 2 months, Bionic Circle every 3 months. The most recent releases landed on September 27, 2026 and August 5, 2026 respectively.

## The numbers

| Metric | Tandem Mobi® mobile app | Bionic Circle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (220 ratings)](https://appshunter.io/ios/app/tandem-mobi-mobile-app/id6449297027/reviews) | **[4.8 (70 ratings)](https://appshunter.io/ios/app/bionic-circle/id6477549955/reviews)** |
| Number of ratings | **220** | 70 |
| Positive reviews | 39.1% of reviews | **76.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 153 MB | 36 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tandem Diabetes Care Inc.](https://appshunter.io/developer/955568376) | [Beta Bionics Inc.](https://appshunter.io/developer/1395643778) |

## What reviewers say

### Tandem Mobi® mobile app

[App page](https://appshunter.io/ios/app/tandem-mobi-mobile-app/id6449297027)

This app controls a small, durable automated insulin delivery system. It offers convenience and discretion, allowing users to manage their diabetes directly from a compatible iPhone. Prescription required for use.

**Highlights:** Automated insulin delivery control, Small and durable system, iPhone controllable, Discreet operation, Requires prescription

**In-app purchases:** none

**What reviewers like**

- 🚀 Great for reducing high and low blood glucose levels
- 🚀 Helps keep you in range
- 🚀 Smaller and lighter pump
- 👍 Easy to use app
- 👍 Mostly intuitive to use

**What reviewers complain about**

- 🐛 Frequent connection issues with CGM
- 🐛 Graph data disappearing
- 🐛 Unreliable app performance
- 🔕 Excessive and repetitive notifications
- 🔕 Inability to customize notifications

**Reported bugs**

- Frequent disconnections between pump and app
- Graph data disappearing
- Incompatibility with newer iPhone models
- Bolus timeout issues

**Requested features**

- Longer stop delivery alarm delay
- Ability to set exercise and activity timers
- More customization options for notifications
- Apple Watch app integration
- Home screen and lock screen widgets


### Bionic Circle

[App page](https://appshunter.io/ios/app/bionic-circle/id6477549955)

This app allows designated individuals to remotely monitor the diabetes management of an iLet user. It provides real-time access to crucial data like glucose levels, insulin status, and alerts, offering peace of mind for caregivers and family members.

**Highlights:** View CGM values, Monitor pump battery and insulin levels, See meal announcements, Track insulin doses, Receive critical alerts (low, high, no data), Remote monitoring from anywhere

**In-app purchases:** none

**What reviewers like**

- 💡 First app of its kind
- 👍 Ease of use
- 👍 Helpful for families and caregivers
- 👍 Customizable alerts
- 👍 Provides peace of mind

**What reviewers complain about**

- 🔋 Lack of battery level and insulin unit information


## Frequently asked questions

### Is Tandem Mobi® mobile app free?

Tandem Mobi® mobile app is free to download, with no in-app purchases.

### Is Bionic Circle free?

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

### Which has better reviews, Tandem Mobi® mobile app or Bionic Circle?

Bionic Circle is rated higher. Tandem Mobi® mobile app averages 3.3 out of 5 from 220 ratings, while Bionic Circle averages 4.8 from 70 ratings.

### Do Tandem Mobi® mobile app or Bionic Circle have ads?

Neither Tandem Mobi® mobile app nor Bionic Circle shows ads.

### Which is updated more often, Tandem Mobi® mobile app or Bionic Circle?

Tandem Mobi® mobile app ships an update every 2 months, and Bionic Circle every 3 months. Most recently, Tandem Mobi® mobile app was updated on September 27, 2026 and Bionic Circle on August 5, 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.*