# Theta vs XY BMS

The clearest difference is update cadence: XY BMS at every 3 months against Theta's every 31 months. XY BMS also leads on iOS requirement (11.0 vs 14.0). Theta's advantage is device support (4 vs 2). On price, 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.

Theta ships an update every 31 months, XY BMS every 3 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | Theta | XY BMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 3 months** |
| Size | 8 MB | 30 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mikhail Fedorov](https://appshunter.io/developer/714735606) | [小宁 冯](https://appshunter.io/developer/1706837355) |

## What reviewers say

### Theta

[App page](https://appshunter.io/ios/app/theta-meter/id1541332058)

**In-app purchases:** none


### XY BMS

[App page](https://appshunter.io/ios/app/xy-bms/id6514303563)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Theta free?

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

### Is XY BMS free?

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

### Do Theta or XY BMS have ads?

Neither Theta nor XY BMS shows ads.

### Which is updated more often, Theta or XY BMS?

Theta ships an update every 31 months, and XY BMS every 3 months. Most recently, Theta was updated on October 27, 2026 and XY BMS on October 27, 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.*