# ExpiWell vs Mathly AI

The clearest difference is review sentiment: Mathly AI at 100% against ExpiWell's 39%. Mathly AI also leads on rating (5.0 vs 4.6). ExpiWell's advantage is in-app purchases (none vs 1) and ratings volume (1.5K vs 7). On price, ads and device support there is nothing between them.

Both are free to download. Mathly AI sells 1 in-app purchase, starting at $3.99 per month. ExpiWell asks for nothing beyond the download.

Mathly AI holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: ExpiWell has 1.5K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 39% of ExpiWell's written reviews are positive against 100% of Mathly AI's.

## The numbers

| Metric | ExpiWell | Mathly AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (1.5K ratings)](https://appshunter.io/ios/app/expiwell/id1070733440/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/mathly-ai/id6778214520/reviews)** |
| Number of ratings | **1.5K** | 7 |
| Positive reviews | 39.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | **Free** | Freemium |
| Size | 35 MB | 1 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Expiwell, Inc.](https://appshunter.io/developer/1070733439) | [Karen Nochimowski](https://appshunter.io/developer/6778214522) |

## What reviewers say

### ExpiWell

[App page](https://appshunter.io/ios/app/expiwell/id1070733440)

This app facilitates experience sampling and ecological momentary assessment for research. It allows users to share opinions and experiences through surveys and daily diaries, ensuring data privacy. Researchers can collect valuable insights through this platform.

**Highlights:** Experience sampling method (ESM), Ecological momentary assessment (EMA), Surveys and mood tracking, Daily diary entries, Just-in-time adaptive interventions (JITAI), Digital ethnography

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

**In-app purchases:** none

**What reviewers like**

- 👍 Straightforward experience
- 🚀 Clean and easy to use
- 💡 Fascinating app

**What reviewers complain about**

- 🐛 Keeps signing users out
- 🐛 App shuts down
- 🐛 Slow performance
- 🐛 Frequent updates

**Reported bugs**

- Login issues
- Incompatibility with certain devices
- Crashing during surveys

**Requested features**

- Better notification system
- More seamless interface


### Mathly AI

[App page](https://appshunter.io/ios/app/mathly-ai/id6778214520)

This app acts as a personal AI math tutor, providing step-by-step explanations for a wide range of math problems. It features a powerful graphing calculator and includes over 140 formulas across six subjects. Notes sync across devices, and an Apple Watch app is also available.

**Highlights:** AI step-by-step solver (text or photo), Scientific & calculus calculator, Graphing calculator with calculus tools, 140+ formulas across 6 subjects, Cross-device notes sync, Apple Watch app

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Pro | $3.99 | per month |


## Frequently asked questions

### Is ExpiWell free?

ExpiWell is free to download, with no in-app purchases.

### Is Mathly AI free?

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

### Which has better reviews, ExpiWell or Mathly AI?

Mathly AI is rated higher. ExpiWell averages 4.6 out of 5 from 1.5K ratings, while Mathly AI averages 5.0 from 7 ratings.

### Do ExpiWell or Mathly AI have ads?

Neither ExpiWell nor Mathly AI shows ads.

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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.*