# Simple Fasting Tracker vs MirrorUp21

The clearest difference is price: Simple Fasting Tracker at Free against MirrorUp21's $1.99. Simple Fasting Tracker also leads on ratings volume (60 vs 2) and device support (4 vs 1). MirrorUp21's advantage is in-app purchases (none vs 6) and review sentiment (88% vs 78%). On rating, update cadence, ads and iOS requirement there is nothing between them.

Simple Fasting Tracker is free to download; MirrorUp21 costs $1.99 up front. Simple Fasting Tracker sells 6 in-app purchases, starting at $4.99 per 7 days. MirrorUp21 asks for nothing beyond the download.

MirrorUp21 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Simple Fasting Tracker has 60 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 78% of Simple Fasting Tracker's written reviews are positive against 88% of MirrorUp21's.

Simple Fasting Tracker ships an update every 2 weeks, MirrorUp21 every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Simple Fasting Tracker | MirrorUp21 |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.8 (60 ratings)](https://appshunter.io/ios/app/simple-fasting-tracker/id6739862459/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mirrorup21-21-day-mirror-work/id6740788231/reviews)** |
| Number of ratings | **60** | 2 |
| Positive reviews | 77.8% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | **Freemium** | Paid |
| Size | 47 MB | 62 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Mamta Shah](https://appshunter.io/developer/1688127666) | [MindPower(HongKong) Limited](https://appshunter.io/developer/1722726836) |

## What reviewers say

### Simple Fasting Tracker

[App page](https://appshunter.io/ios/app/simple-fasting-tracker/id6739862459)

Easily track your intermittent fasting journey with personalized schedules, goal setting, and progress monitoring. Syncs with Apple Watch and HealthKit for seamless data management. Offers detailed analytics to optimize your fasting.

**Highlights:** Quick fast logging, Customizable fasting schedules, Real-time progress tracking, Track weight and body fat, Personalized fasting analytics, Apple Watch and HealthKit sync, Widgets for quick access

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly- Intermittent fasting | $4.99 | per 7 days |
| Monthly - Intermittent fasting | $9.99 | per month |
| Year Promo - Fasting Tracker | $14.99 | per year |
| Yearly - Intermittent Fasting | $24.99 | per year |
| Yearly - Intermittent fasting | $24.99 | per year |
| Lifetime - Fasting Tracker | $49.99 | one-time |


### MirrorUp21

[App page](https://appshunter.io/ios/app/mirrorup21-21-day-mirror-work/id6740788231)

This app guides you through a 21-day mirror work program using AI to create personalized daily tasks. It helps improve self-acceptance, reduce anxiety, and enhance emotional well-being through positive affirmations and guided exercises. Practice anytime, anywhere with real-time feedback and secure, private data storage.

**Highlights:** AI-powered personalized 21-day plans, Daily guided mirror exercises, Real-time voice feedback, Intelligent completion tracking, Zero registration and local data storage, TouchID/FaceID security locks

**In-app purchases:** none


## Frequently asked questions

### Is Simple Fasting Tracker free?

Simple Fasting Tracker is free to download, with in-app purchases available.

### Is MirrorUp21 free?

MirrorUp21 costs $1.99, with no in-app purchases.

### Which has better reviews, Simple Fasting Tracker or MirrorUp21?

MirrorUp21 is rated higher. Simple Fasting Tracker averages 4.8 out of 5 from 60 ratings, while MirrorUp21 averages 5.0 from 2 ratings.

### Do Simple Fasting Tracker or MirrorUp21 have ads?

Neither Simple Fasting Tracker nor MirrorUp21 shows ads.

### Which is updated more often, Simple Fasting Tracker or MirrorUp21?

Simple Fasting Tracker ships an update every 2 weeks, and MirrorUp21 every 9 days. Most recently, Simple Fasting Tracker was updated on October 25, 2026 and MirrorUp21 on October 24, 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.*