BITZER REFRIGERANT RULER vs iFixCompressors
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BITZER REFRIGERANT RULER
This tool quickly determines refrigerant data, including properties, safety groups, GWP, and ODP. It offers intuitive temperature-to-pressure conversion and supports both metric and imperial units. Access detailed information and links to online resources for over 100 refrigerants.
- Refrigerant data lookup
- Temperature-to-pressure conversion
- Metric and imperial unit support
- Over 100 refrigerants
- Oil type information
- GWP and ODP data
- Search filters and favorites
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The BITZER REFRIGERANT RULER enables easy and fast determination of refrigerant data. The app contains all common refrigerants, including key fluid properties, safety group information, global warming potential (GWP), ozone depletion potential (ODP), and information on choice of oil type for the compressor. Furthermore, additional information on refrigerants, links to relevant online documents and other information are displayed (under "More..." in the menu bar). The tool provides an intuitive user interface for easy and accurate temperature-to-pressure conversion, while allowing easy use and switching between different metric (SI) and imperial (IP) units (under "Settings"). // CURRENTLY AVAILABLE REFRIGERANTS // ▸ The app contains data and information on more than 100 natural and synthetic refrigerants, which can also be preselected by filter functions (under "Search"). ▸ For comparison purposes and also for practical use in service and operation of older existing systems, information on previously used refrigerants, which may have been affected by usage restrictions, are also provided. // MAIN FUNCTIONS // ▸ Search filters and favourites: Under the navigation item "Search" or via predetermined "Search filters" or manual entry in the text field the appropriate refrigerant can be found and, if necessary, added to the favourites by tapping the "star symbol". With a simple touch on the selected refrigerant, the slider for the pressure-temperature conversion is displayed. ▸ Ruler: By means of a slider, the values of pressure, dew and boiling (bubble) temperatures (temperature glide resulting from the difference) for the selected refrigerant can be determined. Pressure and temperature values can also be entered manually - either by tapping on the respective field or via the symbol "123". When installing the app overpressure values are preset. With this setting, the atmospheric pressure can be entered either manually on the upper ruler or via the "barometer symbol" to correct the pressure values. A change to absolute pressure values is possible under "Settings", the atmospheric pressure correction is then inactive. Further function: By tapping on the refrigerant name, direct access to "Search" (refrigerant list and search filters) is also possible. ▸ Settings: Under this menu all important parameters for the determination of the atmospheric pressure as well as for temperature and pressure values can be adjusted. Other functions allow for a change to default settings and a repeated display of the “Tutorials” in the ruler view. ▸ Automatic Barometer: The app offers the possibility to determine the current altitude above sea level and/or the actual atmospheric pressure to correct the corresponding dew and bubble temperatures in case of overpressure settings. Depending on the configuration, the analysis for the location in question is optionally carried out automatically via GPS or barometer if the corresponding terminal has the aforementioned sensors. Manually entering the atmospheric pressure or correction is possible as described under “Slider control”. ▸ Temperature / pressure: Temperature and pressure units can be freely selected and combined, if necessary, a mix of SI and IP units is possible as well. For overpressure (or negative pressure) bar (g) or psig / inHg can be selected. In the Setting psig / inHg displays the overpressure values in "psig" and the negative pressure values in "negative inHg" (e.g., -7.5 inHg). ▸ Further information on refrigerants: General and additional information can be found under the information symbol "i" in the header next to the refrigerant name. These include, for example, GWP and ODP values for the refrigerants, safety group, chemical composition or components in mixtures, CAS number, molecular weight, triple and boiling (bubble) points, critical temperature, critical pressure and information on the type of oil for the compressor.
iFixCompressors
This app provides technicians with essential data, calculations, and reference materials for complex compressor systems. It offers tools for password management, altitude correction, unit conversions, and maintenance scheduling, aiming to improve efficiency and accuracy.
- Controller password journal with export
- Altitude correction with GPS/Barometer
- U.S. Customary and SI unit support
- Quick conversions for pressure, temp, flow
- Maintenance schedule and glossary
- Electrical symbols and motor FLA chart
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A technician can only be as good as their tools. Today, mobile devices are quickly joining the ranks of the flashlight as tools always by the technician’s side. The mobile device, with it’s instant access to a world of information, can at times be cumbersome. Scattered sources of information can leave you wondering where that important chart or formula went, iFixCompressors aims to solve this problem. Market demand for improved efficiency and integration has brought increasingly complex compressors. By utilizing microprocessor controls and variable speed drives, compressor system have improved but they have also added to requirements placed on the technician. In order to be effective a technician needs to keep a mountain of cheat sheets, spread sheets, PDFs and paper manuals close at hand. Today’s technician needs a tool that is technologically on par with the compressors that they service. By developing a tool tailored to the technician’s need, we can improve the efficiency and accuracy through technology. iFixCompressors is this technology. Our goal is to eliminate those clunky spread sheets and paper charts. Notable Features: •Controller password journal that can be exported and emailed to other users. Controllers can also be tagged by location with easy access to nearby controllers by using the Today View widget. •Altitude correction for calculations that can be corrected. Correction can be handled automatically with GPS, Barometer (on supported devices) or a manual altitude or ambient pressure can be entered. •Support for both U.S. Customary and SI units •The best default unit types are determined based on the user’s Locale setting for their device at the time of first launch. •Operating Temperature, calculate the minimum operating temperature of an oil flooded screw based on site conditions. •Quick Conversions, quickly convert pressures, temperatures, flow rates etc. •Leak Rate, calculate the leak rate of a system based on system capacity and pressure decay time. •Oil Aging, calculate the effects of operating temperature on oil life. •Maintenance Schedule, recommended maintenance items sourced from the Compressed Air Challenge. •Glossary, terms used often in the industry. •Electrical Symbols, common electrical schematic symbols. •Motor FLA chart, motor full load current based on data in the NEC table 430.250 •Galvanic Corrosion chart, determine the galvanic corrosion risks of different metals. •Pipe Properties chart, various data on pipe including ID, OD, internal volume etc. •4-20mA Scaling, determine a scaled value from the Min and Max values of a sensor and its current mA output or determine the mA output expected based on a relative value. •DC Bus Voltage, determine the expected DC Bus Voltage of a VFD based on line voltage or determine expected line voltage based on measure DC Bus Voltage. •NTC Thermistor, calculate to and from temperature and resistance of an NTC thermistor of 1K, 3K, 5K and 10K types. •Oil Carryover, determine the expected Oil Loss based on compressor specifications and run time or determine the oil carryover density (in PPM) based on the Oil Loss volume. •Platinum RTD, calculate to and from temperature and resistance of an RTD of PT100 and PT1000 types. •Pressure Transducers,convert to and from pressure and voltage for pressure transducers (Gardner Denver transducers currently supported, more to be added) •Pump Time, determine the time required to pump a system capacity from one pressure to another based on the flow rate of the compressor. A stopwatch feature is included that calculates the flow rate based on the running time.
Screenshots
Verdict
The clearest difference is rating: iFixCompressors at 4.9 against BITZER REFRIGERANT RULER's 4.6. BITZER REFRIGERANT RULER's advantage is ratings volume (1.1K vs 44). On price, review sentiment, update cadence 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. Neither carries in-app purchases, so what you see is what you pay.
iFixCompressors holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: BITZER REFRIGERANT RULER has 1.1K ratings behind it against 44, so its average is the more settled of the two. Written reviews complicate that: 64% of BITZER REFRIGERANT RULER's written reviews are positive against 60% of iFixCompressors's, so the app with the better star average is not the one people write more warmly about.
BITZER REFRIGERANT RULER ships an update every 4 months, iFixCompressors every 3 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.
| Parameter | BITZER REFRIGERANT RULER | iFixCompressors |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.1K ratings) | 4.9 (44 ratings) — better |
| Positive reviews | 63.6% of reviews — better | 60.0% of reviews |
| Number of ratings | 1.1K — better | 44 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | BITZER SE | Michael Diehl |
Customer experience
BITZER REFRIGERANT RULER
iFixCompressors
Bugs and requests
BITZER REFRIGERANT RULER
Reported bugs
2 issues- Incorrect pressure-temperature relationships
- Inconsistent units (PSIA vs PSIG)
Requested features
3 requests- Altitude adjustment option
- Ability to filter or hide unwanted refrigerants
- Addition of more refrigerant trade names
iFixCompressors
Not enough reviews yet to summarise bugs or requests.
In-app purchases
BITZER REFRIGERANT RULER
No in-app purchases
iFixCompressors
No in-app purchases
Questions
Is BITZER REFRIGERANT RULER free?
Is iFixCompressors free?
Which has better reviews, BITZER REFRIGERANT RULER or iFixCompressors?
Do BITZER REFRIGERANT RULER or iFixCompressors have ads?
Which is updated more often, BITZER REFRIGERANT RULER or iFixCompressors?
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