# Spot the difference~ vs Target Sum Chain

The clearest difference is update cadence: Target Sum Chain at daily against Spot the difference~'s every 3 weeks. 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.

Spot the difference~ ships an update every 3 weeks, Target Sum Chain daily. The most recent releases landed on October 26, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Spot the difference~ | Target Sum Chain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (6.3K ratings)](https://appshunter.io/ios/app/spot-the-difference/id1350552865/reviews)** | — |
| Number of ratings | **6.3K** | — |
| Positive reviews | 69.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Ad-supported | — |
| Size | 141 MB | 146 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [心东 黄](https://appshunter.io/developer/1494079569) | [katsuya nozaki](https://appshunter.io/developer/6814400228) |

## What reviewers say

### Spot the difference~

[App page](https://appshunter.io/ios/app/spot-the-difference/id1350552865)

Engage your observation skills by spotting subtle variations between two images. Enjoy a vast collection of over 1000 beautifully designed levels, accompanied by soothing background music. Your progress is automatically saved, allowing for seamless continuation of your puzzle-solving journey.

**Highlights:** Find differences between 2 pictures, 1000+ beautiful levels, Relaxing background music, Auto save game progress

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Challenging and fun
- 🎨 Beautiful and crisp images
- ⏱️ No timer, relaxing pace
- 🧠 Helps improve observation skills
- 🕹️ Great collection of mini-games

**What reviewers complain about**

- 💢 Too many ads, disruptive to gameplay
- 🙈 Inappropriate ad content
- 🔍 Need better instructions for some games
- 🔄 Scores/progress reset unexpectedly
- 🤔 Repetitive image themes (young women)

**Reported bugs**

- Game freezes/crashes on ads
- Ads block UI elements, can't close
- Minesweeper game gets stuck on levels

**Requested features**

- Paid version without ads
- Difficulty levels/options
- Magnifier tool for better visibility
- More diverse image themes
- Ability to save/restore progress


### Target Sum Chain

[App page](https://appshunter.io/ios/app/target-sum-chain/id6814400226)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spot the difference~ free?

Spot the difference~ is free to download, with no in-app purchases.

### Is Target Sum Chain free?

Target Sum Chain is free to download, with no in-app purchases.

### Do Spot the difference~ or Target Sum Chain have ads?

Both Spot the difference~ and Target Sum Chain show ads.

### Which is updated more often, Spot the difference~ or Target Sum Chain?

Spot the difference~ ships an update every 3 weeks, and Target Sum Chain daily. Most recently, Spot the difference~ was updated on October 26, 2026 and Target Sum Chain 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.*