# e vs InkPlanner

The clearest difference is price: InkPlanner at Free against e's $0.99. InkPlanner also leads on review sentiment (38% vs 0%). e's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On update cadence and ads there is nothing between them.

InkPlanner is free to download; e costs $0.99 up front. InkPlanner sells 1 one-off in-app purchase. e asks for nothing beyond the download.

e ships an update every 6 months, InkPlanner every 4 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | e | InkPlanner |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.2 (10 ratings)](https://appshunter.io/ios/app/inkplanner/id1665455386/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | 0.0% of reviews | **37.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 10 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [e-skett Corp.](https://appshunter.io/developer/591591895) | [Christian Merk](https://appshunter.io/developer/1487924099) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-calcpro/id603391408)

A powerful calculator app supporting scientific and engineering notation with a wide range of functions and constants. It offers features like calculation history, user-defined variables, and formula insertion for complex computations.

**Highlights:** Scientific and engineering notation, Calculation history, User-defined constants and variables, Advanced mathematical functions, Formula insertion, Autocomplete parentheses

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

**In-app purchases:** none


### InkPlanner

[App page](https://appshunter.io/ios/app/inkplanner/id1665455386)

A digital wall calendar app for iPad and Apple Pencil, offering a clear yearly overview. It allows handwritten entry of appointments and notes with a customizable color-coded legend for enhanced organization and a minimalist planning experience.

**Highlights:** Yearly overview at a glance, Handwritten notes and appointments, Customizable color-coded legend, Minimalist and simple design, Digital replication of physical wall calendars

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calendar | $6.99 | one-time |


## Frequently asked questions

### Is e free?

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

### Is InkPlanner free?

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

### Do e or InkPlanner have ads?

Neither e nor InkPlanner shows ads.

### Which is updated more often, e or InkPlanner?

e ships an update every 6 months, and InkPlanner every 4 months. Most recently, e was updated on October 23, 2026 and InkPlanner 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.*