# Empty vs Soln

The clearest difference is ads: Soln at none against Empty's shown. Soln also leads on update cadence (every 3 weeks vs every 6 months). Empty's advantage is iOS requirement (15.6 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Empty sells 1 one-off in-app purchase and Soln sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Empty ships an update every 6 months, Soln every 3 weeks. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Empty | Soln |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (95 ratings)](https://appshunter.io/ios/app/empty-fasting-tracker/id1349345869/reviews)** | — |
| Number of ratings | **95** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Thang Nguyen](https://appshunter.io/developer/921360262) | [Nan Yu](https://appshunter.io/developer/1559044036) |

## What reviewers say

### Empty

[App page](https://appshunter.io/ios/app/empty-fasting-tracker/id1349345869)

This app helps you track various fasting methods, including intermittent, circadian rhythm, and custom plans. It provides smart reminders and detailed progress views to support your health goals.

**Highlights:** Intermittent Fasting Tracking, Circadian Rhythm Fasting, Custom Fasting Plans, Smart Reminders, Progress Visualization, Fasting History

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $4.99 | one-time |


### Soln

[App page](https://appshunter.io/ios/app/soln/id6772215173)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Soln | $5.99 | one-time |


## Frequently asked questions

### Is Empty free?

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

### Is Soln free?

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

### Do Empty or Soln have ads?

Empty shows ads; Soln does not.

### Which is updated more often, Empty or Soln?

Empty ships an update every 6 months, and Soln every 3 weeks. Most recently, Empty was updated on September 8, 2026 and Soln on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*