Comparison

iSlipstick vs Synapse Reads

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

Head to head
About

iSlipstick

This app provides a suite of essential electronic formula calculators and unit converters. It simplifies complex calculations for Ohm's law, LC circuits, impedance, and more, with a user-friendly interface for quick input and reordering of frequently used tools.

Highlights
  • Ohm's law calculator
  • Op-Amp gain calculator
  • LC circuit resonance calculator
  • RLC circuit impedance calculator
  • dBm to voltage/power converter
  • Resistor calculator
  • Unit converters (metric/imperial)
Features
Read full description

iSlipstick is a collection of commonly used electronic formula calculators and value converters. Included: Ohm's law calculator Op-Amp gain calculator LC circuit resonate frequency calculator Impedance and phase calculator for both series and parallel RLC circuits Parallel resistance calculator for up to six resistors dBm to voltage and power calculator for 50, 75 and 600 ohm loads Convert dBV to volts, dBW to watts and dBuV to microvolts with the dB converter. This converter will also convert the respective value to dB Resistor Calculator for 4 or 5 band resistors and SMD types Time Constant calculator for R - C and R - L networks. Length, Area, Volume, Capacity and Weight converters to go to and from metric and imperial units and within the same standard. Voltage Converter RMS to Peak and Peak-to-Peak and vice-versa. Features: iSlipstick's unique keyboard makes it easy to enter values without having to jump from one keyboard mode to another Numeric input can be American or European standard Re-orderable tables allow you to put the most frequently used functions where you will find them quickly iSlipstick has been tested on iOS 12.0 thru iOS 15.1

About

Synapse Reads

Features
Read full description

Stop letting your reading disappear. You finish a book, feel changed by it, and three weeks later can't remember a single idea. Synapse fixes that. READING SESSIONS Open any book and start a session. Synapse tracks your reading time while you capture highlights — scan a page, type a quote, or read it aloud and let AI transcribe it instantly. When you finish, see exactly how long you read, what you captured, and whether Synapse found a new connection during that session. FLASH INSIGHTS When two highlights from different books share an unexpected idea, Synapse surfaces it automatically. Powered by Claude, the connections go beyond the obvious — finding threads across books you read years apart that you never would have noticed yourself. THREE WAYS TO CAPTURE Scan physical pages with your camera. Type or paste quotes directly. Or hold the mic and read a passage aloud — Whisper transcribes it and shows you the text to confirm. However you read, capturing a highlight takes seconds. CHAT WITH YOUR LIBRARY Ask your entire collection a question. "What do my books say about focus?" "Find a quote I saved about habits." Every answer comes from your own highlights — not the internet. IMPORT YOUR KINDLE HIGHLIGHTS Upload My Clippings.txt and your entire Kindle library arrives instantly — with covers, metadata, and connection checks running automatically. WHO IS THIS FOR? Non-fiction readers who want their highlights to actually do something. People who finish books and want to remember them. Anyone building a reading habit who wants to see it grow. Download Synapse and make everything you read count.

Screenshots

iSlipstick4 screens
Synapse Reads4 screens

Verdict

The call

The clearest difference is update cadence: Synapse Reads at every 4 weeks against iSlipstick's every 3 months. iSlipstick's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

iSlipstick ships an update every 3 months, Synapse Reads every 4 weeks. The most recent releases landed on October 21, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 8 level
iSlipstick versus Synapse Reads: the parameters behind the verdict, then further details
ParameteriSlipstickSynapse Reads
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews90.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size36 MB32 MB
Age rating4+4+
DeveloperSam VirgilloAnsh Dave

In-app purchases

None

iSlipstick

No in-app purchases

None

Synapse Reads

No in-app purchases

Questions

Is iSlipstick free?
iSlipstick is free to download, with no in-app purchases.
Is Synapse Reads free?
Synapse Reads is free to download, with no in-app purchases.
Do iSlipstick or Synapse Reads have ads?
Neither iSlipstick nor Synapse Reads shows ads.
Which is updated more often, iSlipstick or Synapse Reads?
iSlipstick ships an update every 3 months, and Synapse Reads every 4 weeks. Most recently, iSlipstick was updated on October 21, 2026 and Synapse Reads on October 11, 2026.

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