# HBD vs SD Alumni

HBD and SD Alumni are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

HBD ships an update every 4 days, SD Alumni every 5 days. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | HBD | SD Alumni |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 94 MB | 13 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Akaradech Sutheesuntornkul](https://appshunter.io/developer/1616449171) | [SiamSquared Technologies (Thailand) Co., Ltd.](https://appshunter.io/developer/333207356) |

## What reviewers say

### HBD

[App page](https://appshunter.io/ios/app/hbd/id6740551206)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SD Alumni

[App page](https://appshunter.io/ios/app/sd-alumni/id6754590219)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HBD free?

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

### Is SD Alumni free?

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

### Do HBD or SD Alumni have ads?

Neither HBD nor SD Alumni shows ads.

### Which is updated more often, HBD or SD Alumni?

HBD ships an update every 4 days, and SD Alumni every 5 days. Most recently, HBD was updated on October 12, 2026 and SD Alumni on October 10, 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.*