# Sunlink BMS vs i

The clearest difference is update cadence: Sunlink BMS at every 3 months against i's every 19 months. Sunlink BMS also leads on iOS requirement (9.0 vs 12.0). 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.

Sunlink BMS ships an update every 3 months, i every 19 months. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Sunlink BMS | i |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | — | Free |
| Size | 35 MB | 34 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen RF-star Technology Co., Ltd](https://appshunter.io/developer/1513126062) | [i-tecc batteries GmbH](https://appshunter.io/developer/1699629525) |

## What reviewers say

### Sunlink BMS

[App page](https://appshunter.io/ios/app/sunlink-bms/id1600652052)

**Features:** macOS Compatibility

**In-app purchases:** none


### i

[App page](https://appshunter.io/ios/app/i-tecc-plus-bms/id6453992900)

Monitor your i-tecc+ LiFePO4 batteries with detailed insights. Track state of charge, capacity, power usage, temperature, and charge cycles. Essential for managing battery health and performance.

**Highlights:** Monitor state of charge, Track battery capacity, View power consumption, Check battery temperature, Record charge cycles, LiFePO4 battery information

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sunlink BMS free?

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

### Is i free?

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

### Do Sunlink BMS or i have ads?

Neither Sunlink BMS nor i shows ads.

### Which is updated more often, Sunlink BMS or i?

Sunlink BMS ships an update every 3 months, and i every 19 months. Most recently, Sunlink BMS was updated on October 4, 2026 and i on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*