# Interval Weight Loss vs Macro Sync

The clearest difference is in-app purchases: Macro Sync at none against Interval Weight Loss's 11. Macro Sync also leads on update cadence (every 4 days vs fortnightly). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Interval Weight Loss sells 11 in-app purchases, starting at $14.00 per month. Macro Sync asks for nothing beyond the download.

Interval Weight Loss ships an update fortnightly, Macro Sync every 4 days. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Interval Weight Loss | Macro Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (602 ratings)](https://appshunter.io/ios/app/macro-sync/id6475427404/reviews)** |
| Number of ratings | — | **602** |
| Positive reviews | **60.0% of reviews** | 57.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 119 MB | 124 MB |
| Requires iOS | **15.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Interval Weight Loss](https://appshunter.io/developer/1663437345) | [Macros Inc](https://appshunter.io/developer/1646133566) |

## What reviewers say

### Interval Weight Loss

[App page](https://appshunter.io/ios/app/interval-weight-loss/id1663437343)

This scientifically developed program offers a structured approach to sustainable weight loss by resetting metabolism and building healthy habits. It provides flexible meal plans, educational resources, progress tracking tools, and optional access to a personal dietitian.

**Highlights:** Habit tracker for balanced eating, exercise, and sleep, Flexible and adaptable meal plans with new recipes, Educational videos and articles on weight loss science, Tools to track weight, blood changes, and measurements, 24/7 access to a personal dietitian (PLUS plan), Stepped approach to weight loss without starvation mode

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IWL Plan Monthly | $14.00 | per month |
| IWL Plus Monthly | $29.00 | per month |
| IWL Essential | $40.00 | per month |
| IWL Plan Quarterly | $59.00 | per 3 months |
| IWL Plan Quarterly (Trial) | $59.00 | per 3 months |
| IWL Plus Quarterly | $129.99 | per 3 months |
| IWL Plus Quarterly (Trial) | $129.99 | per 3 months |
| IWL Plan Yearly | $179.00 | per year |
| IWL Plan Yearly (Trial) | $179.00 | per year |
| IWL Plus Yearly | $399.00 | per year |
| IWL Plus Yearly (Trial) | $399.00 | per year |


### Macro Sync

[App page](https://appshunter.io/ios/app/macro-sync/id6475427404)

This app simplifies health and fitness by making nutrition tracking easy. Log meals, organize recipes, and monitor calories and macronutrients with proven recommendations. It offers a user-friendly interface with powerful tools for personalized diet management.

**Highlights:** Macro tracking, Micro tracking, Custom goals, Barcode scanner, Recipe creator, Verified food database, Community support

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Accurate tracking
- 💡 Customizable macros
- 🚀 Efficient barcode scanning
- 👍 Helpful recipe builder

**What reviewers complain about**

- 🐛 Crashes and sync issues
- 🔍 Limited food database
- 🤔 Confusing UI and navigation
- 🔍 Inaccurate food entries
- 🤔 Inability to edit custom entries

**Reported bugs**

- Crashes when adding new foods
- Inability to access previous day's entries
- Inconsistent nutrition data measurements

**Requested features**

- Ability to edit custom food entries
- More advanced nutrition tracking options
- Personalized daily macro goals
- Improved barcode scanning reliability
- Expanded food database


## Frequently asked questions

### Is Interval Weight Loss free?

Interval Weight Loss is free to download, with in-app purchases available.

### Is Macro Sync free?

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

### Do Interval Weight Loss or Macro Sync have ads?

Neither Interval Weight Loss nor Macro Sync shows ads.

### Which is updated more often, Interval Weight Loss or Macro Sync?

Interval Weight Loss ships an update fortnightly, and Macro Sync every 4 days. Most recently, Interval Weight Loss was updated on September 21, 2026 and Macro Sync on September 23, 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.*