Empty vs Rhythm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Empty
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.
- Intermittent Fasting Tracking
- Circadian Rhythm Fasting
- Custom Fasting Plans
- Smart Reminders
- Progress Visualization
- Fasting History
Read full descriptionHide full description
Empty is a simple and intuitive fasting tracker used for Intermittent, Circadian Rhythm, and Custom fasting. Choose your favorite fasting type and Empty will track and remind your ongoing progress. Empty supports the following fasting types: 16-Hour Intermittent Fasting (16/8): Popularized by Hugh Jackman (Wolverine) as a efficient way to remove extra weight. 16/8 fasting means eating within a window of eight hours each day such as from 12pm to 8pm and not eating during the remaining 16 hours. It helps get us into the sweet metabolic state of fat burning called Ketosis. Circadian Rhythm Fasting: Based on the research of Dr. Satchin Panda, the confining caloric consumption to about 12-hour period as people did just a century ago. It helps staving off high cholesterol, diabetes and obesity. Custom Fasting: Setup a custom program to meet your fasting goals. You choose your fasting hours per day, and days per week. Features: + Create Custom Fast + Smart Reminder (Remind you when your fasting completes even when the app is turn off) + Create your own custom alarms to fast + View the progress of the current fast + Show the full detail of your fasting days + Show the recent 7 fasts in chart and list + Get the average fasting time right in the Main Interface + Get the total hours of fasting in the Main Interface
Rhythm
This app simplifies intermittent fasting with a daily tracker. It supports various fasting schedules, from beginner-friendly to advanced, and helps users monitor their progress over time. Get notifications when your fast is complete.
- Daily fasting tracker
- Flexible schedule support
- Weekly progress tracking
- Customizable fasting goals
- One-click start
- Progress monitoring
- Completion notifications
Read full descriptionHide full description
Rhythm is a simple intermittent fasting tracker for people who want a clean fast timer without the bloat. No account. No ads. Just a focused way to start a fast, stay on track, and review your history when you're done. Choose any fasting goal from 7 to 24 hours, including popular rhythms like 16:8 and 18:6. Start a fast in seconds, follow your progress live, and switch between countdown and elapsed timer views. Rhythm helps you stay consistent with: - flexible fasting goals - multiple fasts in the same day - reminder and completion notifications - editable fasting history - weekly progress insights If you want a fasting app that feels simple, respectful, and easy to trust, Rhythm gives you the essentials and gets out of your way.
Screenshots
Verdict
The clearest difference is in-app purchases: Rhythm at none against Empty's 1. Rhythm also leads on ads (none vs shown) and review sentiment (89% vs 70%). Empty's advantage is update cadence (every 6 months vs every 13 months) and iOS requirement (15.6 vs 17.6). On price, rating and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Empty sells 1 one-off in-app purchase. Rhythm asks for nothing beyond the download.
Rhythm holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 95 and 454 respectively. Written reviews point the same way: 70% of Empty's written reviews are positive against 89% of Rhythm's.
Empty ships an update every 6 months, Rhythm every 13 months. The most recent releases landed on September 26, 2026 and August 10, 2026 respectively.
| Parameter | Empty | Rhythm |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (95 ratings) | 4.7 (454 ratings) — better |
| Positive reviews | 70.0% of reviews | 88.5% of reviews — better |
| Number of ratings | 95 | 454 — better |
| Update frequency | Every 6 months — better | Every 13 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 14 MB | 3 MB |
| Age rating | 4+ | 12+ |
| Developer | Thang Nguyen | Bijan Cronin |
Customer experience
Empty
Rhythm
Bugs and requests
Empty
Not enough reviews yet to summarise bugs or requests.
Rhythm
Reported bugs
2 issues- Can't add past fasts
- Inconsistent weekly progress tracking
Requested features
5 requests- Ability to track longer fasts (e.g., 48-72 hours)
- Option to view fasting history beyond the past week
- Customizable notifications and reminders
- Integration with health/fitness tracking apps
- Weight tracking and progress visualization
In-app purchases
Empty
- Pro Upgrade$4.99
Rhythm
No in-app purchases
Questions
Is Empty free?
Is Rhythm free?
Which has better reviews, Empty or Rhythm?
Do Empty or Rhythm have ads?
Which is updated more often, Empty or Rhythm?
Other comparisons















