SUNFOREST H100 vs Watch Rate Checker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SUNFOREST H100
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SUNFOREST H-100 (2 nd Generation) This App requires SUNFROEST H-100 device (2 nd generation) to work via Bluetooth interface. Interfacing with SUNFOREST H-100 device via Bluetooth, this App allows user to get meter readings from the H-100 and displays measurement data on smartphone. SUNFOREST H-100 series is a range of portable NIR Spectrometer for non-destructively measuring internal quality of fruits still hanging on the tree. Measurement attributes: Brix, Dry Matter, Moisture, Hue, etc
Watch Rate Checker
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This application is for manually measuring the daily difference of mechanical watches and the monthly difference of quartz watches. Simply touch the button to match the time on your watch to easily measure the day difference. The measurement time can be freely set even during measurement, allowing the user to calculate rough daily differences without having to take measurements for the entire day. Since there is no need to bring the smartphone and watch close together, it can be used safely without worrying about the effects of magnetism.
Screenshots
Verdict
The clearest difference is iOS requirement: SUNFOREST H100 at 11.0 against Watch Rate Checker's 18.2. On price, update cadence, ads and in-app purchases 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.
SUNFOREST H100 ships an update every 3 days, Watch Rate Checker every 4 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.
| Parameter | SUNFOREST H100 | Watch Rate Checker |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Every 4 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 11 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | SUNFOREST | Kazunari Hiyoshi |
In-app purchases
SUNFOREST H100
No in-app purchases
Watch Rate Checker
No in-app purchases
Questions
Is SUNFOREST H100 free?
Is Watch Rate Checker free?
Do SUNFOREST H100 or Watch Rate Checker have ads?
Which is updated more often, SUNFOREST H100 or Watch Rate Checker?
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