JSFITUS vs HyNext
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JSFITUS
Track your daily activity, including steps, calories, and distance, with real-time sports monitoring. It also provides health data tracking for sleep and other metrics, along with useful daily tools.
- Activity data recording (steps, calories, distance)
- Real-time sports monitoring
- Health data tracking (sleep, etc.)
- Historical data records
- Message reception
- Daily tools (alarms, stopwatches)
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JSFITUS is a mobile application software that is paired with smart wearable products. It records and manages activity data such as steps, calories, distance, etc., and has built-in real-time monitoring of various types of sports, as well as health data monitoring and historical records of sleep, etc. In addition, it provides message reception and small tools for daily applications, such as alarms, stopwatches, etc.
HyNext
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HyNext. Built for muscle growth. No more working out how much to add next time. HyNext looks at how many reps you actually did in every set and plans your next weights and reps. Every recommendation says where it comes from: research, common coaching practice, or HyNext's own method. The engine plans it for you. If you disagree, you can change it any time. Free ・Generates a program from your training experience, body type and the look you want, your goal, available equipment and training days per week ・Log every set, exercise library with how-to guides, history and personal bests ・Optional sign-in and cloud backup, so your training log comes with you to a new phone Full version (all features free for the first 14 days, counted from the first time you open the app, no payment needed) ・Decides after every workout whether to add weight, hold or drop ・Gives you a little more rest when your reps drop too much between sets ・Explains why you are stuck and what to do next, not just "keep going" ・Adds sets in small steps during a muscle-gain phase, and watches for two weeks after each increase before asking again; suggests a deload when recovery can't keep up ・Make up or skip missed sessions ・Weekly reports, a yearly review, body weight and per-exercise trends ・The evidence and studies behind every recommendation No ads. HyNext full version is an auto-renewing subscription: ・Monthly NT$150 / month ・Yearly NT$1,000 / year ・These are early-bird prices; the actual price and currency are shown in the App Store ・Payment is charged to your Apple ID account when you confirm the purchase ・The subscription renews automatically unless cancelled before the end of the current period; you can manage or cancel it any time in your App Store account settings Privacy Policy: https://hynext.space-yuan.com/docs/legal/en/privacy-policy.md Terms of Service: https://hynext.space-yuan.com/docs/legal/en/terms.md
Screenshots
Verdict
The clearest difference is in-app purchases: JSFITUS at none against HyNext's 2. JSFITUS also leads on iOS requirement (11.0 vs 15.0). On price, update cadence, 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. HyNext sells 2 in-app purchases, starting at $4.99 per month. JSFITUS asks for nothing beyond the download.
JSFITUS ships an update every 5 days, HyNext every 4 days. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.
| Parameter | JSFITUS | HyNext |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Every 5 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 42 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | JING SHIN TECHNOLOGIES CO., LTD. | YUYUAN LIU |
In-app purchases
JSFITUS
No in-app purchases
HyNext
- 完整版 · 月$4.991 Month
- 完整版 · 年$29.991 Year









