# EMA Mobile Survey vs Memo

The clearest difference is in-app purchases: EMA Mobile Survey at none against Memo's 2. EMA Mobile Survey also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.6). Memo's advantage is update cadence (weekly vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Memo sells 2 in-app purchases, starting at $4.99 per month. EMA Mobile Survey asks for nothing beyond the download.

EMA Mobile Survey ships an update every 3 weeks, Memo weekly. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | EMA Mobile Survey | Memo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/ema-mobile-survey/id6445799261/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 157 MB | 95 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [EMA Wellness LLC](https://appshunter.io/developer/1485888573) | [Pedro Miguel Das Neves SiIva Pereira](https://appshunter.io/developer/1896717359) |

## What reviewers say

### EMA Mobile Survey

[App page](https://appshunter.io/ios/app/ema-mobile-survey/id6445799261)

This tool aids in clinical studies by collecting Ecological Momentary Assessment data. It allows for data collection at various pre-set times throughout the day.

**Highlights:** Clinical study assistance, Ecological Momentary Assessment data collection, Timed data entry, Supports iPhone, iPad, and iPod

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

**In-app purchases:** none


### Memo

[App page](https://appshunter.io/ios/app/memo-appcom/id6770123126)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Memo Premium Monthly | $4.99 | per month |
| Memo Premium Yearly | $41.90 | per year |


## Frequently asked questions

### Is EMA Mobile Survey free?

EMA Mobile Survey is free to download, with no in-app purchases.

### Is Memo free?

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

### Do EMA Mobile Survey or Memo have ads?

Memo shows ads; EMA Mobile Survey does not.

### Which is updated more often, EMA Mobile Survey or Memo?

EMA Mobile Survey ships an update every 3 weeks, and Memo weekly. Most recently, EMA Mobile Survey was updated on October 20, 2026 and Memo on October 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.*