# 1s Speed Math vs Crazy TD

The clearest difference is rating: Crazy TD at 4.0 against 1s Speed Math's 2.0. Crazy TD also leads on update cadence (every 3 months vs every 9 months). 1s Speed Math's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Crazy TD sells 1 one-off in-app purchase. 1s Speed Math asks for nothing beyond the download.

Crazy TD holds the better App Store score, 4.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

1s Speed Math ships an update every 9 months, Crazy TD every 3 months. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 1s Speed Math | Crazy TD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (2 ratings)](https://appshunter.io/ios/app/1s-speed-math/id870766493/reviews) | **[4.0 (2 ratings)](https://appshunter.io/ios/app/crazy-td/id906263409/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 14 MB | 6 MB |
| Requires iOS | **12.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Atoapps](https://appshunter.io/developer/526385913) | [Ang Chee Hong](https://appshunter.io/developer/1420817458) |

## What reviewers say

### 1s Speed Math

[App page](https://appshunter.io/ios/app/1s-speed-math/id870766493)

Test your mental math skills with this fast-paced game. You have only one second to select the correct answer to reach a high score and challenge your friends. It's a quick and engaging way to improve your arithmetic abilities.

**Highlights:** One-second answer time, High score tracking, Challenge friends, Improve arithmetic skills, Quick gameplay

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

**In-app purchases:** none


### Crazy TD

[App page](https://appshunter.io/ios/app/crazy-td/id906263409)

Defend your tower from an invading red army by tapping to shoot. Avoid friendly fire with the blue army and earn points by eliminating enemies and birds. Compete on leaderboards and unlock achievements in this fast-paced defense game.

**Highlights:** Tap to shoot enemies, Swipe for machine gun action, Defend against red army, Avoid shooting blue army, Earn points for kills, Game Center Leaderboard, Game Center Achievements

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove In-Game Ads | $0.99 | one-time |


## Frequently asked questions

### Is 1s Speed Math free?

1s Speed Math is free to download, with no in-app purchases.

### Is Crazy TD free?

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

### Which has better reviews, 1s Speed Math or Crazy TD?

Crazy TD is rated higher. 1s Speed Math averages 2.0 out of 5 from 2 ratings, while Crazy TD averages 4.0 from 2 ratings.

### Do 1s Speed Math or Crazy TD have ads?

Crazy TD shows ads; 1s Speed Math does not.

### Which is updated more often, 1s Speed Math or Crazy TD?

1s Speed Math ships an update every 9 months, and Crazy TD every 3 months. Most recently, 1s Speed Math was updated on October 9, 2026 and Crazy TD on October 17, 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.*