# 66 Days vs HyperMedicus

The clearest difference is in-app purchases: HyperMedicus at none against 66 Days's 5. HyperMedicus also leads on iOS requirement (13.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 66 Days sells 5 in-app purchases, starting at $1.99 per month. HyperMedicus asks for nothing beyond the download.

66 Days ships an update every 3 weeks, HyperMedicus every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | 66 Days | HyperMedicus |
| --- | --- | --- |
| Price | Free | Free |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Freemium | — |
| Size | 19 MB | 6 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Epipherse](https://appshunter.io/developer/1231938524) | [SYNERGY A.I. Co., Ltd.](https://appshunter.io/developer/1617569916) |

## 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 |


### HyperMedicus

[App page](https://appshunter.io/ios/app/hypermedicus/id6742401331)

**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 HyperMedicus free?

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

### Do 66 Days or HyperMedicus have ads?

Neither 66 Days nor HyperMedicus shows ads.

### Which is updated more often, 66 Days or HyperMedicus?

66 Days ships an update every 3 weeks, and HyperMedicus every 2 weeks. Most recently, 66 Days was updated on October 25, 2026 and HyperMedicus on October 25, 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.*