HARD vs Bubble
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HARD
This app syncs with smart devices to track daily activity like steps, distance, and calories. It also monitors heart rate, sleep patterns, and records exercise routes. Receive reminders for messages, alarms, and hydration.
- Activity tracking (steps, distance, calories)
- Exercise recording with GPS tracking
- Heart rate monitoring and analysis
- Sleep pattern analysis
- Message and reminder notifications
- HealthKit integration
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Recording activity: When you wear smart device to sync to APP, you can accurately record your steps, distance and calories burned, historical sleep statistics, and heart rate statistics for the day. Record exercise: When you are connected to the app after the smart device is turned on, you can accurately record the pace, time, distance and movement track of each historical exercise, and improve the effect of running and walking. Heart Rate Monitoring: Use smart device synchronization to analyze heart rate charts in your application. Includes a chart of historical heart rate data, a chart comparison of the maximum heart rate data for a week, and a 24-hour average data graph to see changes in your heart rate interval at any time. To manage stress and exercise effects. Sleep monitoring: Use smart devices to monitor the time of waking, light sleep and deep sleep every night. After synchronizing APP, you can count historical sleep data and analyze the comparison of sleep patterns over the past 7 days. Message reminder: When you wear the bracelet and sync with the app, you can choose to open the message push, alarm reminder, sedentary reminder, drink water reminder to the bracelet in the app. In order to achieve a regular life. **Precautions:** 1.The sports function uses GPS positioning.Running the GPS function continuously in the background may significantly reduce the battery power. 2.HARD has been connected to HealthKit, which can sync your step data, sleep data, and exercise data to [Health].
Bubble
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Bubble 是一款为自由潜水教练与进阶玩家量身打造的训练与学员管理工具。它把训练计时、学员档案、日程编排、潜水日记、PB(个人最佳)追踪,与 AI 潜水顾问、实用下水工具整合在同一个干净优雅的界面里——让你把更多注意力留给海洋,而不是表格与备忘。 【核心能力】 • STA 静态闭气计时器 标准化 2 分钟调息 + Max 模式,也支持自定义多轮计划(每轮单独设置调息与闭气时长,支持单轮 Max)。训练中可标记分段,自动播报最后 10 秒倒数,结束自动保存训练记录。 • CO₂ 耐受训练表 闭气时间、起始休息、每轮递减秒数全部可调。训练中通过双列进度条直观看到 Rest 与 Hold 节奏,支持暂停、恢复与复位,并提供完整的训练总结页。 • 学员管理 集中管理多名学员的个人信息、装备参数、认证级别、当前 PB、训练项目与潜水记录。支持等级、标签分类与进度环,一眼看到每位学员的训练完成度。 • 课程日程 日 / 周 / 月三种视图自由切换,支持学员课程预约。点击任意时间格即可创建日程,事件按时长自动渲染,告别零散的备忘录。 • 潜水日记 记录下潜时间、地点、深度、类型、次数与备注,可附照片或手表截图。所有日志按月份自动归档,检索回看一目了然。 • 个人最佳 PB 8 项常用自由潜水项目(STA、DYN、DYNB、DNF、CWTB、CWT、FIM、CNF)独立追踪,历史趋势自动汇总。 • 潜水助手(AI) 内置专属潜水顾问,随时解答法兰佐、静态闭气、配重、安全等自由潜水问题。支持对话历史卡片式管理,一键续聊;全新聊天界面,阅读更清晰、输入更顺手。(仅供参考,请以专业教练指导为准。) • 图片姿态分析 上传潜水照片,从专业视角获得姿态与动作建议,辅助改进静态闭气、踢蹼与下潜姿态。 • 训练复盘 选择训练周期,自动汇总训练数据,帮你发现瓶颈与进步方向,让每次训练更有针对性。 • 实用下水工具(6 合 1) - 指南针:水面定向,方便找回下潜点 - 手电筒:暗处照明,支持亮度调节与频闪求助 - 下潜安全清单:Buddy check 逐项核对,下水前更安全 - 旅行装备清单:出行打包对照,装备不遗漏 - 气压与海拔:查看气压与海拔变化,辅助海拔训练与飞行后禁潜提醒 - 日出日落 · 潮汐:根据位置把握下水黄金时段 【为教练而生的细节】 - 学员列表支持搜索与标签筛选,理论与考试阶段分类清楚。 - 训练天数与天气状况一起呈现,激励日积月累的坚持。 - 训练过程中全程可一键暂停、记录分段、添加文字笔记,不打断节奏。 - 助手 Tab 集成 AI 与工具,下水前查清单、下水后写复盘,一个 App 全流程覆盖。 【设计语言】 - 海洋色系 + 大量留白,关键数据大字号呈现。 - 玻璃质感与圆角组件,长时间训练阅读也不刺眼。 - 聊天界面全面改版:对话气泡层次清晰,历史记录卡片化,体验更现代。 - 暗色 / 浅色自适应,深潜适配。 如果你是一位自由潜水教练,或者一位希望系统化追踪自己进步的进阶潜水员,Bubble 会是你最值得托付的随身工具箱。 Never hold your breath alone. 永远不要独潜。 ——— Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: Bubble at every 4 days against HARD's fortnightly. HARD's advantage is iOS requirement (11.0 vs 18.0). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
HARD ships an update fortnightly, Bubble every 4 days. The most recent releases landed on October 14, 2026 and September 25, 2026 respectively.
| Parameter | HARD | Bubble |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (6 ratings) — better | — |
| Positive reviews | 13.9% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 181 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Qianhai Walnut Technology Co.,Ltd | 天韵 张 |
In-app purchases
HARD
No in-app purchases
Bubble
No in-app purchases







