Kalkyl vs TRN Audio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kalkyl
A powerful and intuitive calculator designed for speed and ease of use. Features include collaboration, haptic feedback, and advanced input methods like keyboard trackpad mode. Offers basic graphing and localized number formatting for a seamless user experience.
- Optimized for quick calculations
- Collaborate on documents
- Intuitive design with haptic feedback
- Keyboard trackpad and pointer interactions
- Basic graphing capabilities
- Localized number formatting
- Undo and Redo support
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Kalkyl is just a really good calculator. • Optimized for quick calculations. • Collaborate on documents. • Simple and intuitive design. • Haptic feedback (on supported devices). • Undo and Redo support (shake to Undo). • Keyboard trackpad mode using 3D Touch, or Haptic Touch (on supported devices), or two fingers on iPad. • Pointer interactions on iPad. • Basic graphing. • Properly localized number formatting. • App-wide dynamic type support. • Accessible. Terms of Use: https://kalkyl.io/terms.html
TRN Audio
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TRN Audio 是 TRN 官方配套应用，用于连接并管理 TRN 蓝牙耳机与音频设备，让你随时掌控听感与设备状态。 【主要功能】 • 蓝牙一键连接：快速发现、连接并管理你的 TRN 设备 • 降噪与通透：切换降噪、关闭或通透模式，按场景调节强度 • 均衡器与音效：预设 EQ、自定义听感，调节低音/高音等 • 播放与音量控制：便捷调节音量与播放相关设置 • 增强体验：入耳检测、双设备连接、动态低音、3D 音效等（视机型支持） • 按键自定义：自定义手势与操控方式 • 固件升级：检查并更新设备固件，保持最佳体验 • 设备管理：修改设备名称、查找设备、重启与恢复出厂设置 【适用说明】 功能以实际连接的设备型号与固件能力为准。部分机型可能不支持全部选项。 官方网站：https://www.trnaudio.com
Screenshots
Verdict
The clearest difference is in-app purchases: TRN Audio at none against Kalkyl's 1. TRN Audio also leads on update cadence (every 4 days vs every 5 weeks) and iOS requirement (13.0 vs 15.6). Kalkyl's advantage is device support (4 vs 2). On price and ads 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. Kalkyl sells 1 in-app purchase, starting at $4.99 per year. TRN Audio asks for nothing beyond the download.
Kalkyl ships an update every 5 weeks, TRN Audio every 4 days. The most recent releases landed on September 28, 2026 and September 18, 2026 respectively.
| Parameter | Kalkyl | TRN Audio |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (714 ratings) — better | — |
| Positive reviews | 74.7% of reviews | — |
| Number of ratings | 714 — better | — |
| Update frequency | Every 5 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod, Vision Pro — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | nordic io | 娟 伍 |
Bugs and requests
Kalkyl
Reported bugs
3 issues- Crashes on launch for some users
- Graphing issues with certain equations
- Incorrect results for some calculations
Requested features
5 requests- Add a clear/reset button
- Implement calculation history and memory functions
- Improve graphing controls and zooming
- Add support for more mathematical functions (e.g. factorials, fractions)
- Provide an option for independent dark mode
TRN Audio
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Kalkyl
- Kalkyl Pro3 Days trial$4.991 Year
TRN Audio
No in-app purchases
