# e vs Psychology

The clearest difference is in-app purchases: e at none against Psychology's 1. e also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Psychology sells 1 one-off in-app purchase. e asks for nothing beyond the download.

e ships an update every 3 weeks, Psychology every 10 days. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | e | Psychology |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/e-tracker/id1133936910/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free | — |
| Size | 44 MB | 187 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [桂标 曾](https://appshunter.io/developer/985954900) | [Man Hung Sun](https://appshunter.io/developer/1471605573) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-tracker/id1133936910)

This app pairs with smart anti-lost devices to help you find them by triggering an alarm. It also allows you to find your phone from the device and alerts you if the Bluetooth connection is lost. Additional features include camera, video, and map positioning.

**Highlights:** Two-way anti-lost device tracking, Device alarm function, Phone finder function, Bluetooth connection loss alert, Camera and video recording, Map positioning, Meeting recording support

**Features:** Vision Pro support

**In-app purchases:** none


### Psychology

[App page](https://appshunter.io/ios/app/psychology-nlp/id6444365595)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $0.99 | one-time |


## Frequently asked questions

### Is e free?

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

### Is Psychology free?

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

### Do e or Psychology have ads?

Neither e nor Psychology shows ads.

### Which is updated more often, e or Psychology?

e ships an update every 3 weeks, and Psychology every 10 days. Most recently, e was updated on October 24, 2026 and Psychology on October 5, 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.*