feiffer combine vs kyajet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
feiffer combine
This app provides a step-by-step guide for calibrating combine harvesters to achieve optimal settings. It adapts to throughput and losses, ensuring proper adjustment for all harvest conditions and performance ranges, thereby limiting losses.
- Step-by-step calibration guide
- Optimal combine harvester settings
- Adapts to throughput and losses
- Field-tested and reliable values
- Quick and safe calibration
- Demo version available
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Calibration of combine harvesters made easy - The "feiffer combine" App is an easy step by step guide to the optimum settings of your combine harvester. It can be done quickly and safely because these setting values are field-tested and have proved to be reliable with expert operators. The distinguishing feature of this App is: It adapts the settings also to throughput and losses. In this way, the combine harvester is always set properly not only at all harvest conditions but also within each performance range. Losses are limited. This App works as follows: You can test a demo-version to see what this App can offer. If it is useful for you, select the type of your combine harvester and download the corresponding App into your smartphone.
kyajet
This tool helps optimize Keihin carburetor settings with a clean interface and comprehensive data on jets and needles. Compare different setups to improve your vehicle's performance.
- Carburetor setup tool
- Keihin carburetor optimization
- Jet and needle data
- Setup comparison
- Performance improvement
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Kyajet is the (only) tool for setting up Keihin® carburetors (and similar) and gathering additional information about jets and needles. It provides a nice and clean interface, comprehensive needle data, several comparison possibilities and much more. A perfect companion for all drivers of such carburetors! Use it to optimize your carburetor settings while on the road. Enter your current setup data and compare them with different alternatives to let your bike perform better.
Screenshots
Verdict
The clearest difference is price: feiffer combine at Free against kyajet's $7.99. feiffer combine also leads on rating (5.0 vs 4.5). kyajet's advantage is in-app purchases (none vs 10) and review sentiment (100% vs 69%). On update cadence, ads, device support and iOS requirement 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
feiffer combine is free to download; kyajet costs $7.99 up front. feiffer combine sells 10 one-off in-app purchases. kyajet asks for nothing beyond the download.
feiffer combine holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: kyajet has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 69% of feiffer combine's written reviews are positive against 100% of kyajet's, so the app with the better star average is not the one people write more warmly about.
feiffer combine ships an update every 6 months, kyajet every 4 months. The most recent releases landed on August 1, 2026 and September 22, 2026 respectively.
| Parameter | feiffer combine | kyajet |
|---|---|---|
| Price | Free — better | $7.99 |
| Rating | 5.0 (1 ratings) — better | 4.5 (13 ratings) |
| Positive reviews | 68.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 13 — better |
| Update frequency | Every 6 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.1 |
| Further details — not scored | ||
| Size | 20 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrea Feiffer | keywerks GmbH |
Customer experience
feiffer combine
kyajet
In-app purchases
feiffer combine
- John Deere 2054$29.99
- Claas Trion 720$29.99
- Claas Trion 660$29.99
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- Claas Trion 730$29.99
- Claas Trion 640$29.99
- Claas Trion 520$29.99
- Claas Trion 530$29.99
- Claas Trion 650$29.99
- John Deere S 785$29.99
- Claas Trion 750$29.99
kyajet
No in-app purchases
