Comparison

OK Alarm vs LinearMaster

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OK Alarm

This app offers a versatile alarm system designed for complex schedules, including shift work, holidays, and recurring tasks. It provides customizable alerts, time reporting, and reminders for various personal and professional needs.

Highlights
  • Shift work scheduling
  • Holiday and specific date alarms
  • Monthly and yearly recurring reminders
  • Customizable alarm tones
  • Snooze and silence options
  • Water and medication reminders
  • Widget support
Features
Read full description

Supports multiple functions such as shift schedules, holidays, specific dates, and time reporting, meeting various needs in work and daily life: ● Common Alarm Clock:  Flexibly adapts to official holidays, while supporting personalized scheduling for overtime days and leaves. ● Shift Alarm Clock:  A boon for shift workers, requiring just one alarm to handle rotating schedules effortlessly. ● Specific Date Alarm Clock:  Set reminders for specific dates, whether it's for snagging limited-time deals or renewing your driver's license. ● Monthly Alarm Clock:  Set it once and get monthly reminders for tasks like credit card payments, rent, and more – even on specific weekdays of the month. ● Yearly Alarm Clock:  Customized alerts for birthdays and anniversaries, ensuring you never miss those significant moments. ● Custom Recurring Alarm Clock: Stay on track with periodic reminders, perfect for events that repeat every year, month, week, or specific number of days, such as a 5.5-day work week. Featured Highlights: ◆Personalized Alarm Tones: Beyond our selection of 20 preset tones, craft your unique alarm sound using our integrated tone creator. ◆Flexible Controls: Choose to snooze, silence, or postpone alarms with a simple tap. ◆Water & Medication Reminder. ◆Time Announcements: iOS 13 and above users can tailor time announcements, keeping you aware of every passing moment. ◆Dark and Light Modes: Seamlessly adapts to your system theme, providing a comfortable nighttime experience. ◆Widget Support: Get a quick view of upcoming alarms right on your home screen. 【Automatic Renewal Instructions】 The Pro edition is an automatic renewal product,which will be charged from your Apple iTunes account upon confirmation of purchase and automatically renewed 24 hours before your one-year subscription period expires. To cancel the automatic renewal, please manually turn off the automatic renewal in the App Store account Settings 24 hours before the subscription expires. After the automatic renewal is turned off, the fee will not be deducted. Automatic Subscription to Professional Service Agreements https://www.flytiger.work/iOSProtocol.html Privacy Policy https://www.flytiger.work/iOSPrivacy.html

About

LinearMaster

Features
Read full description

线代解霸,专为考研党与大学生打造的线性代数分步推导计算器。拒绝小数近似,全程精确分数计算,让每一步推导都看得清清楚楚。 核心功能(覆盖考研数学大纲全部考点) 矩阵运算:支持矩阵加减、数乘、乘法、转置、逆矩阵(含[A|I]分步推导)、伴随矩阵、矩阵高次幂、余子式计算,可求解矩阵方程AX=B 行列式:支持任意阶行列式精准计算,可自动生成伴随矩阵 线性方程组:自动判定无解、唯一解、无穷多解三种情况,完整导出通解与基础解系,支持克拉默法则分步求解 特征值与特征向量:可计算特征多项式、特征值、特征向量,支持矩阵可对角化判定,兼容复数与无理数特征值计算场景 二次型:计算顺序主子式,精准判定矩阵正定、负定、不定属性,自动导出二次型标准形 向量空间:判定向量线性相关与无关,提取极大线性无关组,验证向量线性表出关系 基变换:支持过渡矩阵计算、向量坐标变换求解 施密特正交化:完整展示正交化与单位化分步代入推导过程 矩阵分解:支持LU、QR、Cholesky三种主流矩阵分解方式 空间几何:可计算向量叉积、混合积、点到平面距离 矩阵诊断:一键生成矩阵行列式、秩、迹及完整矩阵分类报告 2D线性变换可视化:动画直观演示矩阵拉伸、旋转、剪切变换效果,清晰展示特征向量方向 产品特色 1. 分步推导:完整展示每一步初等行变换过程,方便对照答案、排查解题错误 2. 精准分数:全程采用分数精确计算,无小数近似误差,杜绝0.33333等近似值 3. 一键导出:可将完整推导过程渲染为高清长图,支持本地保存、分享研友 4. 历史记录:自动保存最近20次计算记录,搭配矩阵缩略图,查看便捷 5. 考研真题预设:内置多组经典考研真题示例,一键加载,快速上手练习 6. 自定义矩阵键盘:适配正负号、分数快速输入,支持单元格快捷跳转,操作高效 7. 完全离线:所有计算均在本地设备完成,无需联网,安全高效 适用人群 1. 备考考研数学(数一、数二、数三)的学生 2. 大学线性代数课程在校学习者 3. 需要快速验证矩阵计算结果的科研工作者 技术协议:https://app.notion.com/p/Linear-Master-3b8dbcee63058014b4ececf2b192b874?source=copy_link 用户隐私:https://holy-condor-59c.notion.site/Linear-Maste-3b8dbcee6305809c8557c638fc29a0e0?source=copy_link 隐私政策:https://holy-condor-59c.notion.site/Linear-Master-3b8dbcee63058039b440fe805744a151?source=copy_link

Screenshots

OK Alarm4 screens
LinearMaster3 screens

Verdict

The call

The clearest difference is in-app purchases: LinearMaster at none against OK Alarm's 5. OK Alarm's advantage is iOS requirement (13.0 vs 17.0). On price, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OK Alarm sells 5 in-app purchases, starting at $0.99 per month. LinearMaster asks for nothing beyond the download.

Scorecard2 real differences · 8 level
OK Alarm versus LinearMaster: the parameters behind the verdict, then further details
ParameterOK AlarmLinearMaster
PriceFreeFree
Rating4.4 (71 ratings) — better—
Positive reviews88.1% of reviews—
Number of ratings71 — better—
Update frequencyEvery 3 weeks—
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size79 MB6 MB
Age rating12+4+
Developer志聪 黄逸飞 姚

In-app purchases

5 purchases

OK Alarm

Subscriptions2
  • Pro Monthly$0.991 Month
  • Pro Yearly$6.991 Year
One-time3
  • Skip alarm clocks$6.99
  • Schedule-Rest$6.99
  • Remove Ads permanently$14.99
None

LinearMaster

No in-app purchases

Questions

Is OK Alarm free?
OK Alarm is free to download, with in-app purchases available.
Is LinearMaster free?
LinearMaster is free to download, with no in-app purchases.
Do OK Alarm or LinearMaster have ads?
Both OK Alarm and LinearMaster show ads.

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