# Todo Math vs WWF Free Rivers

The clearest difference is review sentiment: Todo Math at 74% against WWF Free Rivers's 31%. Todo Math also leads on rating (4.7 vs 3.6) and update cadence (every 3 weeks vs every 2 months). WWF Free Rivers's advantage is in-app purchases (none vs 10). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Todo Math sells 6 one-off in-app purchases. WWF Free Rivers asks for nothing beyond the download.

Todo Math holds the better App Store score, 4.7 against 3.6. That said, the two scores are not equally well evidenced: Todo Math has 1.1K ratings behind it against 151, so its average is the more settled of the two. Written reviews point the same way: 74% of Todo Math's written reviews are positive against 31% of WWF Free Rivers's.

Todo Math ships an update every 3 weeks, WWF Free Rivers every 2 months. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Todo Math | WWF Free Rivers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/todo-math/id666465255/reviews)** | [3.6 (151 ratings)](https://appshunter.io/ios/app/wwf-free-rivers/id1349935575/reviews) |
| Number of ratings | **1.1K** | 151 |
| Positive reviews | **73.9% of reviews** | 31.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 588 MB | 430 MB |
| Requires iOS | **11.0** | 11.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Enuma, Inc.](https://appshunter.io/developer/577646433) | [World Wildlife Fund](https://appshunter.io/developer/581920334) |

## What reviewers say

### Todo Math

[App page](https://appshunter.io/ios/app/todo-math/id666465255)

This app offers over 2,000 interactive math activities for children from preschool to 2nd grade. It covers counting, calculation, logic, geometry, and time-telling, with adjustable challenge levels and accessibility features for all learners.

**Highlights:** 2,000+ interactive math activities, Covers counting, calculation, logic, geometry, time, Adjustable challenge levels (Pre-K to 2nd grade), Accessibility features (8 languages, dyslexic font), Parent dashboard for progress tracking, Placement test for accurate level selection

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Year Subscription | $49.99 | one-time |
| One Year Subscription | $69.99 | one-time |
| One Year Subscription | $79.99 | one-time |
| Two Years Subscription | $89.99 | one-time |
| One Year Subscription | $99.99 | one-time |
| Two Years Subscription | $119.99 | one-time |

**What reviewers like**

- 👍 Engaging and educational math games
- 🚀 Effective for learning math concepts
- 💡 Customizable settings for different learning styles
- 👍 Visually appealing and non-distracting graphics
- 👍 Helpful for students with special needs

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 💰 Expensive subscription model
- 🔒 Lack of transparency around subscription details
- 🚫 Removal of free features in later versions

**Reported bugs**

- Sound not working on some devices
- Handwriting recognition issues
- Progress reset after app updates

**Requested features**

- Expand content to higher grade levels
- Add more languages and currency options
- Improve progress tracking and reporting for parents
- Introduce more personalization options
- Provide offline access to content


### WWF Free Rivers

[App page](https://appshunter.io/ios/app/wwf-free-rivers/id1349935575)

Explore the vital role of rivers in ecosystems and human life through an interactive augmented reality experience. Manipulate river flows to understand the impact of dams and sustainable development, while collecting stories of the people and wildlife that depend on them.

**Highlights:** Interactive augmented reality river model, Simulate damming and sustainable development, Explore five distinct real-world habitats, Collect stories of people and wildlife, Learn about river threats and opportunities

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🎓 Excellent educational tool for teaching environmental concepts
- 🎨 Beautiful graphics and visual design
- 🔮 Innovative AR technology implementation
- 🌍 Engaging way to learn about river ecosystems and conservation
- 📱 Works well on newer devices (iPhone 13, iPhone X)

**What reviewers complain about**

- 🐛 Frequent crashes on launch and during gameplay
- 📱 Poor compatibility with older devices (iPhone 6, iPad Mini 4)
- 🔋 Causes significant device overheating
- 📸 Difficult camera calibration and surface detection
- 🎮 Limited interactivity and gameplay mechanics

**Reported bugs**

- App crashes immediately after launch or during intro
- Black screen or freezing on opening screen
- Camera fails to detect flat surfaces even in well-lit areas
- AR map jumps and moves erratically during use
- App becomes unresponsive after initial loading screen

**Requested features**

- Non-AR version with traditional touch controls (pan, pinch, zoom)
- Ability to build and destroy dams to see real-time effects
- More interactive gameplay and user agency
- Additional landscapes and environments to explore
- Animated creatures with more natural behaviors


## Frequently asked questions

### Is Todo Math free?

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

### Is WWF Free Rivers free?

WWF Free Rivers is free to download, with no in-app purchases.

### Which has better reviews, Todo Math or WWF Free Rivers?

Todo Math is rated higher. Todo Math averages 4.7 out of 5 from 1.1K ratings, while WWF Free Rivers averages 3.6 from 151 ratings.

### Do Todo Math or WWF Free Rivers have ads?

Neither Todo Math nor WWF Free Rivers shows ads.

### Which is updated more often, Todo Math or WWF Free Rivers?

Todo Math ships an update every 3 weeks, and WWF Free Rivers every 2 months. Most recently, Todo Math was updated on October 21, 2026 and WWF Free Rivers on October 22, 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.*