# iSperm Equine 6 vs TB Stacker

The clearest difference is update cadence: TB Stacker at every 3 weeks against iSperm Equine 6's every 3 months. TB Stacker also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

iSperm Equine 6 ships an update every 3 months, TB Stacker every 3 weeks. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | iSperm Equine 6 | TB Stacker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 29 MB | 70 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Aidmics Biotechnology Co., Ltd](https://appshunter.io/developer/1119461359) | [zak goichman](https://appshunter.io/developer/1873030457) |

## What reviewers say

### iSperm Equine 6

[App page](https://appshunter.io/ios/app/isperm-equine-6/id1624762376)

**Features:** macOS Compatibility

**In-app purchases:** none


### TB Stacker

[App page](https://appshunter.io/ios/app/tb-stacker/id6758459185)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iSperm Equine 6 free?

iSperm Equine 6 is free to download, with no in-app purchases.

### Is TB Stacker free?

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

### Do iSperm Equine 6 or TB Stacker have ads?

Neither iSperm Equine 6 nor TB Stacker shows ads.

### Which is updated more often, iSperm Equine 6 or TB Stacker?

iSperm Equine 6 ships an update every 3 months, and TB Stacker every 3 weeks. Most recently, iSperm Equine 6 was updated on October 18, 2026 and TB Stacker on October 14, 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.*