# One BT 2.0 vs SDF

The clearest difference is update cadence: One BT 2.0 at fortnightly against SDF's every 4 months. 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.

One BT 2.0 ships an update fortnightly, SDF every 4 months. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | One BT 2.0 | SDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Size | 105 MB | 42 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Connecting-dots](https://appshunter.io/developer/1441035259) | [Colegio de Escribanos de la Ciudad de Buenos Aires](https://appshunter.io/developer/1185879051) |

## What reviewers say

### One BT 2.0

[App page](https://appshunter.io/ios/app/one-bt-20/id6471289153)

**Features:** macOS Compatibility

**In-app purchases:** none


### SDF

[App page](https://appshunter.io/ios/app/sdf/id6747388469)

**In-app purchases:** none


## Frequently asked questions

### Is One BT 2.0 free?

One BT 2.0 is free to download, with no in-app purchases.

### Is SDF free?

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

### Do One BT 2.0 or SDF have ads?

Neither One BT 2.0 nor SDF shows ads.

### Which is updated more often, One BT 2.0 or SDF?

One BT 2.0 ships an update fortnightly, and SDF every 4 months. Most recently, One BT 2.0 was updated on October 20, 2026 and SDF on October 28, 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.*