# Interval Weight Loss vs Zing Wellbeing

The clearest difference is review sentiment: Zing Wellbeing at 100% against Interval Weight Loss's 60%. Zing Wellbeing also leads on in-app purchases (none vs 11). Interval Weight Loss's advantage is iOS requirement (15.0 vs 18.6). On price, update cadence, 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. Zing Wellbeing asks for nothing beyond the download.

Interval Weight Loss ships an update fortnightly, Zing Wellbeing monthly. The most recent releases landed on September 21, 2026 and July 31, 2026 respectively.

## The numbers

| Metric | Interval Weight Loss | Zing Wellbeing |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Subscription | **Free** |
| Size | 119 MB | 20 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Interval Weight Loss](https://appshunter.io/developer/1663437345) | [Zing Wellbeing PTY LTD](https://appshunter.io/developer/1803279819) |

## 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 |


### Zing Wellbeing

[App page](https://appshunter.io/ios/app/zing-wellbeing/id6743520200)

This app offers a holistic approach to women's health and wellness, aiming to improve energy, digestion, mental well-being, and physical fitness. It provides recipes, meal plans, fitness videos, and mental wellness programs, supported by expert coaching.

**Highlights:** 750+ recipes, 20+ specialized meal plans, On-demand fitness videos, Mental wellness programs, Expert group coaching, Women-only support group

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use and navigate
- 👍 Comprehensive features for health and wellness
- 👍 Delicious and healthy recipes
- 👍 Helpful community support
- 👍 Personalized meal and fitness plans


## Frequently asked questions

### Is Interval Weight Loss free?

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

### Is Zing Wellbeing free?

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

### Do Interval Weight Loss or Zing Wellbeing have ads?

Neither Interval Weight Loss nor Zing Wellbeing shows ads.

### Which is updated more often, Interval Weight Loss or Zing Wellbeing?

Interval Weight Loss ships an update fortnightly, and Zing Wellbeing monthly. Most recently, Interval Weight Loss was updated on September 21, 2026 and Zing Wellbeing on July 31, 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.*