# Sum It Up Now — Fast Mental Math Puzzle

> Fast Mental Math Puzzle (iPhone/iPad app by Peter Pannewitz.)

- Source: https://appshunter.io/ios/app/sum-it-up-now/id6769440761 (this page in markdown: same URL + `.md`)
- Developer: [Peter Pannewitz](https://appshunter.io/developer/959366045)
- Category: Games, Casual, Strategy
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.6 · 3 MB
- Languages: American English, French (France), Italian, Japanese, Korean, Chinese (Simplified, China), European Spanish
- Released: 2026-05-14
- Data updated: 2026-08-24
- User reviews in markdown: https://appshunter.io/ios/app/sum-it-up-now/id6769440761/reviews.md

## What is Sum It Up Now?

Sum It Up is a fast, minimalist mental math puzzle game. Add the blue numbers, subtract the red ones, and tap the correct sum before time runs out.

Play quick 5-second rounds, train calmly in Zen Mode, and challenge your best score.

How to Play:
• Blue = Plus: Add the positive numbers.
• Red = Minus: Subtract the red numbers.
• Beat the Clock: Each round starts with 5 seconds. Every 10 rounds, the time limit gets shorter until it reaches 3 seconds.
• Zen Mode: Practice without pressure.

Key Features:
• Minimalist design: Clean gameplay with no distractions.
• High scores: Track your progress and beat your own records.
• Haptic and audio feedback: Adjustable in settings.
• No ads: Pure gameplay with no pop-ups or forced video ads.
• Optional global leaderboards: Use Game Center to compare scores worldwide. By default, your scores stay local and private.

Train your mental arithmetic, test your reaction speed, or play a quick brain teaser on the commute.

Download Sum It Up and see how far you can go.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Support Tip | $0.99 | one-time |



## Version history (last 5 releases)

### 2.2 — 2026-06-05

Minor UX/UI improvements

### 2.1 — 2026-05-31

Added intro / tutorial.

### 2.0 — 2026-05-29

Minor bug fixes.

### 1.9 — 2026-05-26

Added Spanisch localization
Minor UX/UI improvements

### 1.8 — 2026-05-25

Added Chinese, Japanese, and Korean localizations.

## More apps by Peter Pannewitz

- [4CP](https://appshunter.io/ios/app/4cp/id967783456)
- [Count It Up Now](https://appshunter.io/ios/app/count-it-up-now/id6773027378)
- [Flip It Up Now](https://appshunter.io/ios/app/flip-it-up-now/id6775406104)
- [Wire It Up](https://appshunter.io/ios/app/wire-it-up/id6777088999)
- [CampLog: Camping Diary](https://appshunter.io/ios/app/camplog-camping-diary/id6790441757)

All apps by Peter Pannewitz: https://appshunter.io/developer/959366045

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*