# Basic Calc Plus vs MarkDays

The clearest difference is in-app purchases: Basic Calc Plus at none against MarkDays's 1. Basic Calc Plus also leads on update cadence (every 17 months vs every 70 months). MarkDays's advantage is ads (none vs shown) and device support (4 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. MarkDays sells 1 one-off in-app purchase. Basic Calc Plus asks for nothing beyond the download.

Basic Calc Plus ships an update every 17 months, MarkDays every 70 months. The most recent releases landed on September 17, 2026 and August 20, 2026 respectively.

## The numbers

| Metric | Basic Calc Plus | MarkDays |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/markdays-count-to-days/id1490546689/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 17 months** | Every 70 months |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 8 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Osamu Ishigami](https://appshunter.io/developer/901265058) | [昊罡 姚](https://appshunter.io/developer/844772956) |

## What reviewers say

### Basic Calc Plus

[App page](https://appshunter.io/ios/app/basic-calc-plus/id926102502)

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

**In-app purchases:** none


### MarkDays

[App page](https://appshunter.io/ios/app/markdays-count-to-days/id1490546689)

This tool helps you remember and count down to significant life events like anniversaries, birthdays, and important schedules. Receive timely reminders so you never miss a special occasion. Track both past and future important dates.

**Highlights:** Mark important life days, Count down to events, Track past events, Timely reminders, Anniversary tracking, Birthday reminders

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock MarkedDays Professional | $4.99 | one-time |


## Frequently asked questions

### Is Basic Calc Plus free?

Basic Calc Plus is free to download, with no in-app purchases.

### Is MarkDays free?

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

### Do Basic Calc Plus or MarkDays have ads?

Basic Calc Plus shows ads; MarkDays does not.

### Which is updated more often, Basic Calc Plus or MarkDays?

Basic Calc Plus ships an update every 17 months, and MarkDays every 70 months. Most recently, Basic Calc Plus was updated on September 17, 2026 and MarkDays on August 20, 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.*