Chord Training Assistant vs 国力公证
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chord Training Assistant
This app helps musicians learn and practice chords with a vast library of over 800 options. It includes a metronome, practice history tracking, and a chord library, with a VIP plan offering unlimited practice and an ad-free experience.
- Supports 800+ chords
- Built-in metronome
- Practice history and statistics
- Comprehensive chord library
- Dark mode support
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- Function Description 1. Support 800+ chords 2. Powerful metronome 3. Practice history / statistic 4. Chord library 5. Support dark mode - VIP Plan Monthly plan: $1.99 Yearly plan: $12.99 Permanent Plan: $19.99 VIP functions: Unlimited practice chord number, no ads., unblock future new VIP functions. - Links Terms of Use： https://blog.osfpu.com/random-chord-terms-of-use/ Privacy Policy：https://blog.osfpu.com/random-chord-privacy-policy/ User Support： https://blog.osfpu.com/random-chord-support/
国力公证
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“国力公证APP” 集在线确权、取证、公证等功能于一体，运用云计算、区块链技术，电子证据平台自动取证等以提供优质可靠服务，保证证据的有效性和真实性。解决取证难、维权难、诉讼难等诸多问题，为权利人提供强有力的客观证据支持，证据直通互联网法院。
Screenshots
Verdict
The clearest difference is in-app purchases: 国力公证 at none against Chord Training Assistant's 3. Chord Training Assistant's advantage is update cadence (every 2 weeks vs every 6 months) and iOS requirement (9.0 vs 12.0). 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
Both are free to download. Chord Training Assistant sells 3 in-app purchases, starting at $1.99 per month. 国力公证 asks for nothing beyond the download.
Chord Training Assistant ships an update every 2 weeks, 国力公证 every 6 months. Both last shipped on November 3, 2026.
| Parameter | Chord Training Assistant | 国力公证 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 weeks — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 40 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | 世杰 宋 | 四川省成都市国力公证处 |
In-app purchases
Chord Training Assistant
- Monthly Plan$1.991 Month
- Yearly Plan$13.491 Year
- Permanent VIP$19.99
国力公证
No in-app purchases
