随手弹幕 vs WaterTesting
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
随手弹幕
Create a vibrant, eye-catching LED scrolling display on your phone. Customize text, effects, and colors for concerts, events, or personal messages. Save and export your creations easily.
- Customizable LED scrolling text
- Multiple dynamic effects (snow, fireworks, etc.)
- Adjustable text size, speed, and color
- Scene presets for common use cases
- Save and manage text creations
- Export as image, long image, or GIF
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【随手弹幕 - 让你的文字闪耀全场】 「随手弹幕」是一款拥有赛博朋克美学的 LED 滚动字幕应用。无论是演唱会应援、电竞比赛现场、机场接机，还是浪漫表白、摆摊叫卖，都能让你的手机变成醒目的发光灯牌。 核心功能： 炫酷特效：内置雪花、烟花、流星、爱心、彩虹、火焰等多种动态效果。 高度定制：自由调节文字大小、滚动速度、字体颜色和背景颜色，支持精选艺术字体。 场景素材：八个常用场景，先预览再应用，让表达更方便。 完整作品库：保存文字与样式，支持收藏置顶、重命名、更新和另存副本，旧文字历史仍可使用。免费版可保存 3 个作品。 导出分享：支持当前画面图片、完整文字长图及完整滚动循环 GIF。 沉浸展示：点击画面即可收起或展开底部操作区。 PRO 终身版特权： 解锁高级字体与动态特效 移除广告 不限数量的作品库 图片与 GIF 无水印导出 已有终身 PRO 用户自动享有本次新增的 PRO 权益。
WaterTesting
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水质检测工具，可检测pH等
Screenshots
Verdict
The clearest difference is in-app purchases: WaterTesting at none against 随手弹幕's 1. WaterTesting also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 2 months). On price 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. 随手弹幕 sells 1 one-off in-app purchase. WaterTesting asks for nothing beyond the download.
随手弹幕 ships an update every 2 months, WaterTesting every 3 weeks. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.
| Parameter | 随手弹幕 | WaterTesting |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 50 MB | 16 MB |
| Age rating | 4+ | 17+ |
| Developer | xiangshang | Shanghai Ruosull Technology Co., Ltd |
In-app purchases
随手弹幕
- Pro (LifeTime)$1.99
WaterTesting
No in-app purchases
