# Heart Diary vs Quantify

The clearest difference is in-app purchases: Quantify at none against Heart Diary's 6. Quantify also leads on ads (none vs shown) and update cadence (daily vs fortnightly). Heart Diary's advantage is iOS requirement (15.0 vs 17.6). On price and device support there is nothing between them.

Both are free to download. Heart Diary sells 6 one-off in-app purchases. Quantify asks for nothing beyond the download.

Heart Diary ships an update fortnightly, Quantify daily. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Heart Diary | Quantify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/quantify-optimize-life/id6480232018/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Daily** |
| Monetization | — | Free |
| Size | 80 MB | 20 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Minwook Kim](https://appshunter.io/developer/1609772646) | [Nicole Blair Stoddart](https://appshunter.io/developer/1738530435) |

## What reviewers say

### Heart Diary

[App page](https://appshunter.io/ios/app/heart-diary-mood-emotion/id6450883054)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Pass | $0.99 | one-time |
| Premium Pass | $1.99 | one-time |
| Premium pass | $3.99 | one-time |
| Premium pass | $7.99 | one-time |
| Premium pass | $14.99 | one-time |
| Premium pass | $29.99 | one-time |


### Quantify

[App page](https://appshunter.io/ios/app/quantify-optimize-life/id6480232018)

This app allows users to create custom data trackers for any aspect of their lives. Visualize your progress with real-time charts and analyze relationships between different variables. Securely sync your data across devices with cloud backup.

**Highlights:** Custom trackers (numeric, text, boolean, timestamp), Real-time line charts, Correlation analysis with p-values, Cloud sync across devices, Secure sign-in with Apple/Google

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Heart Diary free?

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

### Is Quantify free?

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

### Do Heart Diary or Quantify have ads?

Heart Diary shows ads; Quantify does not.

### Which is updated more often, Heart Diary or Quantify?

Heart Diary ships an update fortnightly, and Quantify daily. Most recently, Heart Diary was updated on October 3, 2026 and Quantify on October 7, 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.*