# 66 Days vs Workout Planner Pro+

The clearest difference is price: 66 Days at Free against Workout Planner Pro+'s $4.99. 66 Days also leads on update cadence (every 3 weeks vs every 2 months). Workout Planner Pro+'s advantage is in-app purchases (none vs 5) and iOS requirement (15.0 vs 18.0). On review sentiment, ads and device support there is nothing between them.

66 Days is free to download; Workout Planner Pro+ costs $4.99 up front. 66 Days sells 5 in-app purchases, starting at $1.99 per month. Workout Planner Pro+ asks for nothing beyond the download.

66 Days ships an update every 3 weeks, Workout Planner Pro+ every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 66 Days | Workout Planner Pro+ |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.1 (9 ratings)](https://appshunter.io/ios/app/66-days-habit-tracker/id1439590647/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | **72.9% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Freemium** | Paid |
| Size | 19 MB | 75 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Epipherse](https://appshunter.io/developer/1231938524) | [siarhei yatsuk](https://appshunter.io/developer/1511544233) |

## What reviewers say

### 66 Days

[App page](https://appshunter.io/ios/app/66-days-habit-tracker/id1439590647)

This app helps you build lasting habits by encouraging daily repetition over a 66-day period. Set project-specific goals and track your progress with features like memos, photos, and notifications.

**Highlights:** 66-day habit building system, Project-based goal setting, Daily progress tracking, Memo and photo recording, Dark mode support, Push notifications

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Month | $1.99 | per month |
| Premium 3 Month | $4.99 | per 3 months |
| Premium 1 Year | $9.99 | per year |
| Project Streak Recovery | $2.99 | one-time |
| Premium Lifetime | $22.99 | one-time |


### Workout Planner Pro+

[App page](https://appshunter.io/ios/app/workout-planner-pro-plus/id1551143946)

Create personalized fitness plans, track your progress, and log detailed workout results. This customizable planner supports strength training, yoga, and general fitness, making exercise management simple for all levels. Save daily measurements, photos, and back up your data.

**Highlights:** Personalized workout plan creation, Customizable exercise parameters, Workout calendar and scheduling, Activity and progress tracking, Daily measurement and photo logging, Data backup and restore, Workout sharing

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

**In-app purchases:** none


## Frequently asked questions

### Is 66 Days free?

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

### Is Workout Planner Pro+ free?

Workout Planner Pro+ costs $4.99, with no in-app purchases.

### Do 66 Days or Workout Planner Pro+ have ads?

Neither 66 Days nor Workout Planner Pro+ shows ads.

### Which is updated more often, 66 Days or Workout Planner Pro+?

66 Days ships an update every 3 weeks, and Workout Planner Pro+ every 2 months. Most recently, 66 Days was updated on November 2, 2026 and Workout Planner Pro+ on November 3, 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.*