# Sumaddle vs Deduce

The clearest difference is update cadence: Sumaddle at every 3 weeks against Deduce's every 8 months. Sumaddle also leads on ratings volume (767 vs 2). Deduce's advantage is iOS requirement (13.0 vs 16.0). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Sumaddle sells 15 one-off in-app purchases and Deduce sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Sumaddle against 5.0 for Deduce. That said, the two scores are not equally well evidenced: Sumaddle has 767 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 95% of Sumaddle's written reviews are positive against 100% of Deduce's.

Sumaddle ships an update every 3 weeks, Deduce every 8 months. The most recent releases landed on October 12, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Sumaddle | Deduce |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (767 ratings)](https://appshunter.io/ios/app/sumaddle/id1552172214/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/deduce/id6745759798/reviews)** |
| Number of ratings | **767** | 2 |
| Positive reviews | 94.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 30 MB | 76 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Buchanan](https://appshunter.io/developer/1540556286) | [Mark Mainwood](https://appshunter.io/developer/769006329) |

## What reviewers say

### Sumaddle

[App page](https://appshunter.io/ios/app/sumaddle/id1552172214)

This logic puzzle game transforms pencil-and-paper challenges into interactive brain teasers. Fit number combinations to clues using pure logic, with no mental arithmetic required. Enjoy over 150 free puzzles of varying difficulty, with built-in help and offline play.

**Highlights:** Interactive logic puzzles, Number combination fitting, Pure logic solving, Built-in help and mistake correction, Over 150 free puzzles, Offline play, Ad-free experience

**Features:** Family Sharing

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quirky, Pack 5 | $0.99 | one-time |
| Very Difficult Puzzles | $0.99 | one-time |
| Quirky, Pack 1 | $0.99 | one-time |
| Premium 9x9 Puzzles, Pack 1 | $0.99 | one-time |
| Crafty, Pack 1 | $0.99 | one-time |
| Crafty, Pack 2 | $0.99 | one-time |
| Crafty, Pack 3 | $0.99 | one-time |
| Sneaky, Pack 1 | $0.99 | one-time |
| Sneaky, Pack 2 | $0.99 | one-time |
| Sneaky, Pack 3 | $0.99 | one-time |
| Tricky, Pack 1 | $0.99 | one-time |
| Tricky, Pack 2 | $0.99 | one-time |
| Tricky, Pack 3 | $0.99 | one-time |
| Assorted Puzzles | $0.99 | one-time |
| Puzzle Generator | $9.99 | one-time |

**What reviewers like**

- 👍 Fun and challenging game
- 👍 Clean and intuitive interface
- 👍 Helpful hint system
- 🚀 No ads or data collection
- 💡 Unique puzzle concept

**What reviewers complain about**

- 🐛 Automatic hints can be intrusive
- 🐛 Inability to replay completed puzzles
- 💡 Need more free/sample puzzles
- 💡 Difficulty progression could be improved

**Reported bugs**

- Losing progress when minimizing the app
- Inconsistent difficulty ratings

**Requested features**

- Ability to selectively pencil in notes
- More difficult puzzle options
- Synced progress across devices
- Detailed statistics and leaderboard


### Deduce

[App page](https://appshunter.io/ios/app/deduce/id6745759798)

Engage your mind with daily logic puzzles designed for all skill levels. Explore a vast archive of handcrafted challenges, with themed packs available for purchase. Enjoy a distraction-free experience focused purely on gameplay.

**Highlights:** Three daily puzzles (Easy, Medium, Hard), Instant access to over 100 puzzles, Themed puzzle packs (free and paid), In-app tutorial and strategy guide, Handcrafted puzzles with unique solutions, Ad-free, timer-free gameplay

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kids' Pack 1 | $0.99 | one-time |
| Hard Pack 1 | $0.99 | one-time |
| Just + and x 1 | $0.99 | one-time |
| Mixed Pack 1 | $0.99 | one-time |
| Just + and > 1 | $0.99 | one-time |
| Just x and > 1 | $0.99 | one-time |
| Medium Pack 1 | $0.99 | one-time |
| Easy Pack 1 | $0.99 | one-time |
| Access Archives | $1.99 | one-time |
| Extra Hard Pack 1 | $1.99 | one-time |


## Frequently asked questions

### Is Sumaddle free?

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

### Is Deduce free?

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

### Which has better reviews, Sumaddle or Deduce?

Deduce is rated higher. Sumaddle averages 4.9 out of 5 from 767 ratings, while Deduce averages 5.0 from 2 ratings.

### Do Sumaddle or Deduce have ads?

Neither Sumaddle nor Deduce shows ads.

### Which is updated more often, Sumaddle or Deduce?

Sumaddle ships an update every 3 weeks, and Deduce every 8 months. Most recently, Sumaddle was updated on October 12, 2026 and Deduce on September 24, 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.*