# HachiCalendar2 Pro vs HypotenuseCalc

The clearest difference is rating: HypotenuseCalc at 5.0 against HachiCalendar2 Pro's 3.5. HypotenuseCalc also leads on review sentiment (85% vs 50%) and in-app purchases (none vs 2). HachiCalendar2 Pro's advantage is update cadence (fortnightly vs every 25 months) and ratings volume (23 vs 1). On ads and device support there is nothing between them.

HachiCalendar2 Pro costs $1.99 and HypotenuseCalc $0.99 up front. HachiCalendar2 Pro sells 2 one-off in-app purchases. HypotenuseCalc asks for nothing beyond the download.

HypotenuseCalc holds the better App Store score, 5.0 against 3.5. That said, the two scores are not equally well evidenced: HachiCalendar2 Pro has 23 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of HachiCalendar2 Pro's written reviews are positive against 85% of HypotenuseCalc's.

HachiCalendar2 Pro ships an update fortnightly, HypotenuseCalc every 25 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | HachiCalendar2 Pro | HypotenuseCalc |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | [3.5 (23 ratings)](https://appshunter.io/ios/app/hachicalendar2-pro/id380105927/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hypotenusecalc/id640750228/reviews)** |
| Number of ratings | **23** | 1 |
| Positive reviews | 49.9% of reviews | **85.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 25 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 43 MB | 1 MB |
| Requires iOS | 16.1 | **8.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [加明 严](https://appshunter.io/developer/372968860) | [EIICHI KOMINE](https://appshunter.io/developer/495643581) |

## What reviewers say

### HachiCalendar2 Pro

[App page](https://appshunter.io/ios/app/hachicalendar2-pro/id380105927)

This app combines calendar, to-do lists, and an AI assistant for seamless organization. Manage events as tasks, utilize AI for scheduling, and keep key dates visible with floating countdown cards. It offers detailed time insights and supports multiple calendar systems.

**Highlights:** Infinite vertical scrolling, Events as to-dos, Integrated AI assistant, Floating countdown cards, Time insights & analytics, Quick voice input, Gregorian/Lunar calendar support

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| New Year Theme Pack | $1.99 | one-time |
| Weather Theme Pack | $2.99 | one-time |


### HypotenuseCalc

[App page](https://appshunter.io/ios/app/hypotenusecalc/id640750228)

Calculate angles and lengths of triangles with two distinct modes. One mode uses a fixed triangle shape, while the other adjusts the figure based on triangle size. This tool is valuable for professionals in architecture, surveying, and design.

**Highlights:** Automatic angle and length calculation, Fixed triangle shape mode, Variable triangle figure mode, Useful for architecture, Valuable for surveying, Aids in design

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HachiCalendar2 Pro free?

HachiCalendar2 Pro costs $1.99, and also offers in-app purchases.

### Is HypotenuseCalc free?

HypotenuseCalc costs $0.99, with no in-app purchases.

### Which has better reviews, HachiCalendar2 Pro or HypotenuseCalc?

HypotenuseCalc is rated higher. HachiCalendar2 Pro averages 3.5 out of 5 from 23 ratings, while HypotenuseCalc averages 5.0 from 1 ratings.

### Do HachiCalendar2 Pro or HypotenuseCalc have ads?

Neither HachiCalendar2 Pro nor HypotenuseCalc shows ads.

### Which is updated more often, HachiCalendar2 Pro or HypotenuseCalc?

HachiCalendar2 Pro ships an update fortnightly, and HypotenuseCalc every 25 months. Most recently, HachiCalendar2 Pro was updated on October 24, 2026 and HypotenuseCalc 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.*