# Happiness Hacker vs ShadowLog App

The clearest difference is in-app purchases: Happiness Hacker at none against ShadowLog App's 1. ShadowLog App's advantage is update cadence (every 2 months vs every 4 months) and ratings volume (11 vs 3). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. ShadowLog App sells 1 one-off in-app purchase. Happiness Hacker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Happiness Hacker against 5.0 for ShadowLog App. Both are backed by a comparable volume of ratings — 3 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Happiness Hacker ships an update every 4 months, ShadowLog App every 2 months. The most recent releases landed on September 30, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Happiness Hacker | ShadowLog App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/happiness-hacker/id6469530403/reviews) | [5.0 (11 ratings)](https://appshunter.io/ios/app/shadowlog-app/id6759536120/reviews) |
| Number of ratings | 3 | **11** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 3 MB | 48 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Noble and Greenough School](https://appshunter.io/developer/547957767) | [LILA GRACE CHAMBERLAIN](https://appshunter.io/developer/1870142663) |

## What reviewers say

### Happiness Hacker

[App page](https://appshunter.io/ios/app/happiness-hacker/id6469530403)

Track behaviors scientifically proven to boost well-being, including sleep, gratitude, and acts of kindness. Access guided meditations and an online course on the science of happiness. All data is stored locally for privacy.

**Highlights:** Daily happiness and sleep tracker, Gratitude journal, Kindness, connection, savoring, and activity tracker, Guided meditations, Science of Well-Being online course, Strategies for inner critic, strengths, and goal-setting

**Features:** macOS Compatibility

**In-app purchases:** none


### ShadowLog App

[App page](https://appshunter.io/ios/app/shadowlog-app/id6759536120)

This app helps premed students document and organize their clinical shadowing experiences. It features a secure log, a medical terminology translator, and tools for tracking hours and writing reflections, with AMCAS-ready exports for applications.

**Highlights:** Secure clinical log with HIPAA compliance, Terminology Bridge for medical jargon, Daily reflection prompts, Hour tracking dashboard by specialty, AMCAS-ready PDF/CSV export

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AMCAS Activity Export | $9.99 | one-time |


## Frequently asked questions

### Is Happiness Hacker free?

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

### Is ShadowLog App free?

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

### Which has better reviews, Happiness Hacker or ShadowLog App?

Happiness Hacker and ShadowLog App are both rated 5.0 out of 5 on the App Store, from 3 and 11 ratings respectively.

### Do Happiness Hacker or ShadowLog App have ads?

Neither Happiness Hacker nor ShadowLog App shows ads.

### Which is updated more often, Happiness Hacker or ShadowLog App?

Happiness Hacker ships an update every 4 months, and ShadowLog App every 2 months. Most recently, Happiness Hacker was updated on September 30, 2026 and ShadowLog App on October 14, 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.*