Comparison

iSlipstick RF vs BumbleUp

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

iSlipstick RF

This app provides a comprehensive suite of calculators and converters specifically designed for radio frequency (RF) engineers and technicians. It includes tools for path loss, antenna gain, intermodulation, and standard electrical calculations, along with various unit conversions.

Highlights
  • RF-specific calculators
  • Standard electrical calculators
  • Unit converters
  • Path loss calculation
  • Intermodulation analysis
  • Antenna gain and beamwidth
Features
Read full description

iSlipstick RF iSlipstick RF contains all of the functionality of the standard iSlipstick plus many functions specifically for RF work. RF Calculators included with iSlipstick RF are: PATH LOSS – Enter all of the RF link parameters such as transmitter output power, antenna gain, cable loss, distance and frequency to find the actual RF level at the receiver. MICROWAVE DISH BEAMWIDTH & GAIN – Enter the dish size, frequency and efficiency to find the 3 dB beamwidth and antenna gain. WAVELENGTH – Metric & U.S. RETURN LOSS / VSWR – Enter forward and reflected power to find VSWR, reflection coefficient and return loss. FRESNEL ZONE – Enter link distance, obstacle distance and frequency to find the 60% and 80% zone radii. This calculator also provides a visual display of ground clearance. VELOCITY FACTOR (VOP) – Enter the dielectric constant of a coax to find the Velocity of Propagation and enter the cable length to find the propagation delay. This calculator can also find the necessary cable length for a given delay and VOP. INTERMODULATION – Enter up to six frequencies to find the 2nd, 3rd, 5th and 7th intermod products that can be created. A 'hit' window can be set to eliminate out of band results. I.F. FREQUENCY – Enter the incoming carrier frequency and 1st local oscillator frequency to find the resulting I.F. and whether the spectrum is inverted or normal. This is a great calculator when working with up/down converters. INTERCEPT POINT – Once you have determined the levels of fundamental and intermodulation tones in a system, you can enter those values into this calculator to find either IP2 or IP3. Standard Calculators included in iSlipstick RF are: OHM'S LAW – Find voltage, current, resistance and power. REACTANCE – Find inductive and capacitive reactance by entering frequency and capacitance or inductance. RESONANCE – Find the resonant frequency of an inductor – capacitor pair. VOLTAGE DIVIDER – Enter the voltage into a resistor divider network to find the output voltage. PARALLEL RESISTOR – Enter up to six resistor values to find the resultant parallel resistance. SERIES and PARALLEL RLC – Enter R, C and L of a series or parallel circuit to find the impedance and phase angle. OP-AMP – Find the gain of either an inverting or non-inverting op-amp circuit. TIME CONSTANT - Find the first 5 time constants of both RC and RL circuits. Standard Converters included in iSlipstick RF are: RESISTOR COLOR CODE – Enter a resistor value to find the color code or enter the color code to find the resistor value. SMD RESISTOR – Enter 3 digit or 4 digit SMD codes to find the resistance value. Also does EIA-96 conversion. VOLTAGE CONVERTER – Convert between RMS, average, peak and p-p values. dB CONVERTER – Convert dBm, dBV, dBW and dBuV to absolute values and vice-versa in 50, 75 and 600 ohm load. TEMPERATURE – Convert between four popular scales. PERIOD – FREQUENCY – Convert waveform period to frequency and vice-versa. LENGTH, AREA, VOLUME, CAPACITY and WEIGHT – Convert from metric to U.S. and vice-versa. Also convert within same standard. A help page is also available as a quick function guide. Tested with iOS 12.0 thru iOS 15.1

About

BumbleUp

Organize your thoughts, projects, and knowledge in one private workspace. Create notes, manage tasks, and build a personal wiki with nested pages and two-way linking. All your data is stored locally, ensuring privacy and offline access.

Highlights
  • Note organization
  • Task management
  • Personal wiki creation
  • Nested file trees
  • Two-way linking
  • Offline access
  • Drag-and-drop reordering
Read full description

BumbleUp is your all-in-one workspace for notes, tasks, and knowledge. Capture ideas, plan projects, and build your personal wiki – all offline, without accounts. Creativity & Planning: – Write and organize notes – Create dictionaries – simple tables with two columns – Manage task lists Knowledge Management: – Build personal wiki pages with nested file trees – Turn your notes into a digital Zettelkasten with two-way links – View the same data in multiple layouts Fast & User-Friendly Interface: – Reorder files with drag-and-drop – Preview file content directly in the list – Add notes to the right topic with a single tap Offline & Private: – No account or internet connection needed – No ads, no tracking, no subscriptions needed – Your data stays on your device Capture your ideas. Plan your journey. Master your knowledge.

Screenshots

iSlipstick RF4 screens
BumbleUp4 screens

Verdict

The call

The clearest difference is rating: BumbleUp at 5.0 against iSlipstick RF's 4.7. BumbleUp also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.6). iSlipstick RF's advantage is ratings volume (3 vs 1). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

BumbleUp holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Scorecard4 real differences · 6 level
iSlipstick RF versus BumbleUp: the parameters behind the verdict, then further details
ParameteriSlipstick RFBumbleUp
PriceFreeFree
Rating4.7 (3 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings3 — better1
Update frequencyEvery 10 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.613.0 — better
Further details — not scored
Size43 MB31 MB
Age rating4+4+
DeveloperSam VirgilloVojtech Sodoma

In-app purchases

None

iSlipstick RF

No in-app purchases

None

BumbleUp

No in-app purchases

Questions

Is iSlipstick RF free?
iSlipstick RF is free to download, with no in-app purchases.
Is BumbleUp free?
BumbleUp is free to download, with no in-app purchases.
Which has better reviews, iSlipstick RF or BumbleUp?
BumbleUp is rated higher. iSlipstick RF averages 4.7 out of 5 from 3 ratings, while BumbleUp averages 5.0 from 1 ratings.
Do iSlipstick RF or BumbleUp have ads?
Neither iSlipstick RF nor BumbleUp shows ads.

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