BA II Plus Calculator vs 1DayS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BA II Plus Calculator
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.
- Time-Value-of-Money (TVM) calculations
- Amortization schedules
- Cash-flow analysis (NPV, IRR)
- Four depreciation methodologies
- Breakeven, profit, and percent difference calculations
Read full descriptionHide full description
BA II Plus Calculator is a mobile application software based on BA II PLUS calculator. Its use method is consistent with that of physical calculator. FULL RANGE OF FINANCE AND SCIENCE FUNCTIONS • Solves Time-Value-of-Money (TVM) calculations • Generates amortization schedules • Performs cash-flow analysis, and computes NPV and IRR • Calculates depreciation with four different methodologies • Breakeven, profit and percent difference calculations
1DayS
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.
- 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
Read full descriptionHide full description
“1DayS”是你的首选纪念日管理工具，让你不再错过任何重要日子。不管是过去还是未来，亦或是当下，无论是生日、纪念日，还是节日、还款日，亦或是考试倒计时、发工资倒计时，都会精确为您记录和提醒。 亮点功能 l 支持公历/农历 l 多款小组件灵活自定义 l 云端同步，重要日子不怕丢失 l 多款风景背景供选择 l 公共节日一键添加 l 日子长按排序，随心而定 l 浅色深色两套UI主题 隐私声明： https://www.kairusi.com/1days-privacy.html
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | BA II Plus Calculator | 1DayS |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.1 (19 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 55.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 19 — better | 2 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 4 MB | 102 MB |
| Age rating | 4+ | 4+ |
| Developer | 国栋 焦 | KAIROS Company Limited |
Customer experience
BA II Plus Calculator
1DayS
In-app purchases
BA II Plus Calculator
No in-app purchases
1DayS
No in-app purchases
