# Abaco vs Sumday

The clearest difference is price: Sumday at Free against Abaco's $2.99. Abaco's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence there is nothing between them.

Sumday is free to download; Abaco costs $2.99 up front. Sumday sells 1 one-off in-app purchase. Abaco asks for nothing beyond the download.

Abaco ships an update weekly, Sumday every 11 days. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Abaco | Sumday |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/abaco-flash-mental-math/id6753171585/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 11 days |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 47 MB | 34 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jiwon Park](https://appshunter.io/developer/1842841535) | [TON CO., LTD.](https://appshunter.io/developer/6796677381) |

## What reviewers say

### Abaco

[App page](https://appshunter.io/ios/app/abaco-flash-mental-math/id6753171585)

This app offers a comprehensive mental math training experience, allowing users to practice addition, subtraction, multiplication, and division. It features customizable difficulty, speed, and problem types, making it ideal for competition preparation and general brain training.

**Highlights:** Addition/Subtraction practice, Multiplication/Division practice, Adjustable difficulty, Customizable speed and problem settings, Multi-language support, Preset saving and loading

**Features:** Vision Pro support

**In-app purchases:** none


### Sumday

[App page](https://appshunter.io/ios/app/sumday-mental-math-practice/id6802302480)

Sharpen your number sense with daily mental math exercises. This app offers quick arithmetic practice, practical math tricks, and progress tracking to improve your speed and accuracy in just five minutes a day.

**Highlights:** Daily arithmetic questions, Adaptive difficulty levels, Mental math technique cards, Progress tracking and reports, Streak tracking, Offline functionality

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sumday Premium | $3.99 | one-time |


## Frequently asked questions

### Is Abaco free?

Abaco costs $2.99, with no in-app purchases.

### Is Sumday free?

Sumday is free to download, with in-app purchases available.

### Do Abaco or Sumday have ads?

Sumday shows ads; Abaco does not.

### Which is updated more often, Abaco or Sumday?

Abaco ships an update weekly, and Sumday every 11 days. Most recently, Abaco was updated on October 30, 2026 and Sumday on October 29, 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.*