# OnefuncPlan vs Calcifon

The clearest difference is rating: Calcifon at 5.0 against OnefuncPlan's 4.0. Calcifon also leads on review sentiment (100% vs 67%) and device support (4 vs 2). OnefuncPlan's advantage is update cadence (every 4 days vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. OnefuncPlan sells 13 in-app purchases, starting at $2.99 per month and Calcifon sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Calcifon holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 67% of OnefuncPlan's written reviews are positive against 100% of Calcifon's.

OnefuncPlan ships an update every 4 days, Calcifon every 2 months. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | OnefuncPlan | Calcifon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/onefuncplan-vmt-task-planner/id912230923/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calcifon/id1641658581/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Monetization | Freemium | Freemium |
| Size | 35 MB | 41 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Masaru Kondo](https://appshunter.io/developer/912230926) | [KauriLab Inc.](https://appshunter.io/developer/530847194) |

## What reviewers say

### OnefuncPlan

[App page](https://appshunter.io/ios/app/onefuncplan-vmt-task-planner/id912230923)

This app helps you gain insights into your daily actions and routines. It offers task management, workload tracking, and stress monitoring, with AI-powered analysis based on Volitional Motion Theory. Share schedules with others and access your data across multiple devices.

**Highlights:** Quick task and idea capture, Schedule and task management tools, AI-powered workload and stress monitoring, Shared schedules with commenting, Cross-device data synchronization, Optional location for weather

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic(1 month) | $2.99 | per month |
| Pro (1 month) | $2.99 | per month |
| 3 mons. & special free trial | $8.49 | per 3 months |
| Premium (1 month) | $9.99 | per month |
| Premium (3 months) | $13.99 | per 3 months |
| Premium (6 months) | $25.99 | per 6 months |
| Basic(1 year) | $29.99 | per year |
| Pro (1 year) | $29.99 | per year |
| Premium (1 year) + α | $46.99 | per year |
| Premium (1 year) | $99.99 | per year |
| OnetimePremium | $0.99 | one-time |
| Premium service (one month) | $4.99 | one-time |
| Onefunc Plan Advance | $15.99 | one-time |


### Calcifon

[App page](https://appshunter.io/ios/app/calcifon/id1641658581)

This multiplatform calendar app offers a simple and intuitive way to manage your schedule. It syncs with iOS and Google Calendars, allowing for easy event rescheduling and organization with color-coding. Premium features unlock additional views and customization options.

**Highlights:** Simple and intuitive interface, Drag & drop rescheduling, Color-coded events, Automatic sync with iOS and Google Calendar, Monthly & Daily schedule views (Premium), iPad and Mac app support (Premium), Customizable background image (Premium)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (1 month) | $1.99 | per month |
| Premium (1 year) | $19.99 | per year |


## Frequently asked questions

### Is OnefuncPlan free?

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

### Is Calcifon free?

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

### Which has better reviews, OnefuncPlan or Calcifon?

Calcifon is rated higher. OnefuncPlan averages 4.0 out of 5 from 3 ratings, while Calcifon averages 5.0 from 2 ratings.

### Do OnefuncPlan or Calcifon have ads?

Neither OnefuncPlan nor Calcifon shows ads.

### Which is updated more often, OnefuncPlan or Calcifon?

OnefuncPlan ships an update every 4 days, and Calcifon every 2 months. Most recently, OnefuncPlan was updated on October 4, 2026 and Calcifon on October 9, 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.*