Annual Ring vs PowerMJ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Annual Ring
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The annual ring is an exquisite diary and note taking application. Simple design and powerful functionality. Supports functions such as location and labeling, and can be used without network. When there is network, data is automatically synchronized to the cloud, and data storage is worry free.
PowerMJ
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PowerMJ是上海普华科技自主研发的移动端产品,可与普华PowerMJ开发平台系列产品配套使用。产品以低代码为核心,为项目提供多样的展示方案。用户可根据自己的需要构建自己的业务流程、列表展示方式、表单展示形式。产品通过与WEB数据联动、工作流程、消息机制、在线协作,为项目跨组织、跨专业、跨地域多方协作提供了解决方案,可有效提高客户、工程总包、施工单位等项目各参与方的沟通与协作效率。
Screenshots
Verdict
The clearest difference is update cadence: PowerMJ at every 4 days against Annual Ring's every 3 weeks. Annual Ring's advantage is iOS requirement (10.0 vs 12.0). 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.
Annual Ring ships an update every 3 weeks, PowerMJ every 4 days. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.
| Parameter | Annual Ring | PowerMJ |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 25 MB | 87 MB |
| Age rating | 4+ | 17+ |
| Developer | 颖昭 范 | Shanghai Power Science&Technology Co., Ltd. |
In-app purchases
Annual Ring
No in-app purchases
PowerMJ
No in-app purchases









