# Roots Abacus vs RHPM Pre

The clearest difference is update cadence: Roots Abacus at weekly against RHPM Pre's every 4 months. RHPM Pre's advantage is iOS requirement (12.0 vs 16.6). 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.

Roots Abacus ships an update weekly, RHPM Pre every 4 months. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Roots Abacus | RHPM Pre |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Size | 39 MB | 104 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Kian Lee](https://appshunter.io/developer/997242579) | [Taidii Pte Ltd](https://appshunter.io/developer/921378893) |

## What reviewers say

### Roots Abacus

[App page](https://appshunter.io/ios/app/roots-abacus/id1493360304)

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

**In-app purchases:** none


### RHPM Pre

[App page](https://appshunter.io/ios/app/rhpm-pre-school/id6752631617)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Roots Abacus free?

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

### Is RHPM Pre free?

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

### Do Roots Abacus or RHPM Pre have ads?

Neither Roots Abacus nor RHPM Pre shows ads.

### Which is updated more often, Roots Abacus or RHPM Pre?

Roots Abacus ships an update weekly, and RHPM Pre every 4 months. Most recently, Roots Abacus was updated on October 10, 2026 and RHPM Pre on October 3, 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.*