# BA II Plus Calculator vs 1DayS

The clearest difference is price: 1DayS at Free against BA II Plus Calculator's $1.99. 1DayS also leads on review sentiment (100% vs 55%) and rating (5.0 vs 3.1). BA II Plus Calculator's advantage is ratings volume (19 vs 2). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

1DayS is free to download; BA II Plus Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

1DayS holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: BA II Plus Calculator has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 55% of BA II Plus Calculator's written reviews are positive against 100% of 1DayS's.

BA II Plus Calculator ships an update every 2 months, 1DayS every 3 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | BA II Plus Calculator | 1DayS |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.1 (19 ratings)](https://appshunter.io/ios/app/ba-ii-plus-calculator/id1466088186/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/1days/id1668529103/reviews)** |
| Number of ratings | **19** | 2 |
| Positive reviews | 55.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 4 MB | 102 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [国栋 焦](https://appshunter.io/developer/1466088185) | [KAIROS Company Limited](https://appshunter.io/developer/1495144014) |

## What reviewers say

### BA II Plus Calculator

[App page](https://appshunter.io/ios/app/ba-ii-plus-calculator/id1466088186)

This app replicates the functionality of a physical financial calculator. It offers a comprehensive suite of tools for time-value-of-money calculations, cash-flow analysis, depreciation, and breakeven point computations.

**Highlights:** Time-Value-of-Money (TVM) calculations, Amortization schedules, Cash-flow analysis (NPV, IRR), Four depreciation methodologies, Breakeven, profit, and percent difference calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### 1DayS

[App page](https://appshunter.io/ios/app/1days/id1668529103)

This app helps you track and remember important dates like birthdays, anniversaries, holidays, and deadlines. It offers customizable widgets, cloud synchronization, and a choice of UI themes. Never miss a significant event again with precise reminders.

**Highlights:** Track birthdays, anniversaries, holidays, deadlines, Public and lunar calendar support, Customizable widgets, Cloud synchronization, Multiple background options, One-click public holiday addition, Light and dark UI themes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BA II Plus Calculator free?

BA II Plus Calculator costs $1.99, with no in-app purchases.

### Is 1DayS free?

1DayS is free to download, with no in-app purchases.

### Which has better reviews, BA II Plus Calculator or 1DayS?

1DayS is rated higher. BA II Plus Calculator averages 3.1 out of 5 from 19 ratings, while 1DayS averages 5.0 from 2 ratings.

### Do BA II Plus Calculator or 1DayS have ads?

Neither BA II Plus Calculator nor 1DayS shows ads.

### Which is updated more often, BA II Plus Calculator or 1DayS?

BA II Plus Calculator ships an update every 2 months, and 1DayS every 3 weeks. Most recently, BA II Plus Calculator was updated on November 3, 2026 and 1DayS on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*