# Left vs 66 Challenge

The clearest difference is rating: 66 Challenge at 5.0 against Left's 4.6. 66 Challenge also leads on monetization model (freemium vs paid) and device support (3 vs 1). Left's advantage is ratings volume (429 vs 5). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Left sells 28 in-app purchases, starting at $0.99 per 7 days and 66 Challenge sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

66 Challenge holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Left has 429 ratings behind it against 5, so its average is the more settled of the two.

Left ships an update every 4 days, 66 Challenge every 5 days. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Left | 66 Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (429 ratings)](https://appshunter.io/ios/app/left-widgets-for-time-left/id6740155884/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/66-challenge/id6758270405/reviews)** |
| Number of ratings | **429** | 5 |
| Positive reviews | 73.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | Paid | **Freemium** |
| Size | 244 MB | 18 MB |
| Requires iOS | 26.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Cntxt Limited](https://appshunter.io/developer/1778834894) | [Moad Ghajjate El Fal](https://appshunter.io/developer/1871890791) |

## What reviewers say

### Left

[App page](https://appshunter.io/ios/app/left-widgets-for-time-left/id6740155884)

Visualize your time with customizable widgets for your Home Screen, Lock Screen, and StandBy. Track life progress, countdowns to important events, and monitor habits with streak tracking. Offers a clean and visually appealing way to stay aware of your time.

**Highlights:** Time progress widgets (year, week, day), Life progress tracking, Event countdowns, Habit and streak tracking, Customizable widget styles and colors, Apple Calendar sync

**In-app purchases (28)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Left Premium | $0.99 | per 7 days |
| Left Premium | $2.99 | per 7 days |
| Left Premium | $3.99 | per 7 days |
| Left Premium | $8.99 | per 7 days |
| LEGEND | $8.99 | per year |
| Left Premium | $19.99 | per year |
| Left Premium | $19.99 | per 7 days |
| Left Premium | $24.99 | per year |
| Left Premium | $24.99 | per year |
| Left Premium | $29.99 | per year |
| Left Premium | $29.99 | per year |
| Left Premium | $34.99 | per year |
| Left Premium | $34.99 | per year |
| Thanks! | $39.99 | per year |
| Left+ | $0.99 | one-time |
| Awesome | $1.99 | one-time |
| Left+ | $2.99 | one-time |
| Left+ | $3.99 | one-time |
| Legend | $4.99 | one-time |
| Left+ Thanks | $5.99 | one-time |
| Left+ | $6.99 | one-time |
| Left+ | $7.99 | one-time |
| Left+ | $8.99 | one-time |
| Left Premium | $12.99 | one-time |
| Left Premium | $29.99 | one-time |
| Left Premium | $49.99 | one-time |
| Left Premium | $69.99 | one-time |
| Left Premium | $149.00 | one-time |

**What reviewers like**

- 🚀 Minimalist design
- 👍 Simple and intuitive
- 🔒 Privacy-respecting
- 💡 Unique and insightful concept
- 👍 Clean and bloat-free

**What reviewers complain about**

- 🐛 Buggy app with frequent issues
- 💡 Lack of customization options
- 💡 Predetermined lifespan not accurate for all users

**Reported bugs**

- Widget not working
- Blank screen on widget after update
- Percentage left showing -inf%

**Requested features**

- Custom lifespan input
- Ability to set custom milestones
- Widget color customization
- Life widget
- Ability to track minutes left in the day


### 66 Challenge

[App page](https://appshunter.io/ios/app/66-challenge/id6758270405)

Build lasting habits with a science-backed system designed to guide you through a 66-day journey. Track daily progress, visualize your transformation, and stay motivated with social features and achievements. Transform your life one habit at a time.

**Highlights:** Daily habit tracking, Progress visualization, Streak protection, Social feed and squads, Customizable reminders, Achievement badges

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.99 | per month |
| Pro Annual | $29.99 | per year |
| Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Left free?

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

### Is 66 Challenge free?

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

### Which has better reviews, Left or 66 Challenge?

66 Challenge is rated higher. Left averages 4.6 out of 5 from 429 ratings, while 66 Challenge averages 5.0 from 5 ratings.

### Do Left or 66 Challenge have ads?

Neither Left nor 66 Challenge shows ads.

### Which is updated more often, Left or 66 Challenge?

Left ships an update every 4 days, and 66 Challenge every 5 days. Most recently, Left was updated on October 20, 2026 and 66 Challenge on October 5, 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.*