Dev Calc vs SynapX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dev Calc
This app assists developers and programmers with immediate numeric conversions between binary, octal, decimal, and hexadecimal formats. It also provides tools for generating color codes from RGB, HSL, and HSV values, with a color picker and preset options.
- Numeric conversion (Bin, Oct, Dec, Hex)
- Signed/Unsigned options
- Adjustable bit sizes (8, 16, 32, 64)
- RGB, HSL, HSV color code generation
- Color picker
- Preset color options
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You can convert numeric to Bin, Oct, Dec, Hex immediately with Signed, Unsigned. ** Introduction ** This is a calculator app to help System Developers and Programmers. Convert numeric to binary, octal, decimal, hex immediately. You can set conversion bit number and signed/unsigned, so you can adjust settings for binary, short, int, long. Also you can get clolor code for system application from RGB and Color Picker. And you can choose preset color simply. ** Overview ** - Convert numeric to binary, octal, decimal, hex immediately. - You can edit each digits for detailed confirmation. - You can get color code from RGB, HSL, HSV and Color Picker. - Using preset color, you can get color code quickly. ** Characteristics ** >> Numeric conversion - You can input numeric in binary, octal, decimal, hex. - You can choose bits size from 8bits, 16bits, 32bits, 64bits. - You can choose signed numeric or unsigned numeric. - you can edit each digits directly. >> Color code - You can see a color code in Hex, RGB, HSL and HSV. - Support alpha channel of color. - You can get a color code from RGB, HSL, HSV adjuster and Color Picker. - You can get a color code just by choosing a preset color. ** Terms of Use ** https://coconutsdevelop.com/en/terms/terms_of_use.html ** Developer website ** https://coconutsdevelop.com/
SynapX
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SynapX — AI Notes & Second Brain SynapX is an AI-powered note-taking app designed to help you capture thoughts, organize ideas, and retrieve what matters later. Use quick notes, voice capture, OCR import, Apple Notes sharing, private notes, reminders, search, and an AI assistant to build a personal knowledge system that stays useful over time. CAPTURE NOTES Create notes from text, voice, scanned documents, images, clipboard content, and shared Apple Notes. AI AUTO-ORGANIZATION SynapX can help clean up notes, generate titles and summaries, add tags, choose categories, detect action items, identify questions, and connect related notes. ASK YOUR NOTES Use the Ask feature to search your saved notes semantically, recall details, find connections, and propose edits or new notes for your approval. PRIVATE VAULT Mark sensitive notes as Private and keep them behind Face ID, Touch ID, or your device passcode. Private notes are not sent to AI. OCR IMPORT Scan documents or import images from Photos. Text recognition runs on device using Apple technologies. REMINDERS & CALENDAR Turn notes into scheduled items and view upcoming reminders in a calendar-style workflow. KNOWLEDGE INSIGHTS Review topic clusters, high-priority notes, related notes, temporary notes, and knowledge-health views to keep your second brain organized. LOCAL-FIRST NOTES Your notes are stored on your device. Account profile data is used for authentication and app functionality. PRIVACY FIRST - Sign in with Apple - Delete your account in the app - No ads - No third-party analytics or tracking SDKs - Private notes are never sent to AI AI DISCLAIMER SynapX uses automated AI features to organize and respond to your notes. AI output may be inaccurate, incomplete, or inappropriate. SynapX does not provide legal, medical, financial, therapeutic, or other professional advice. Always verify important information and consult a qualified professional where appropriate. SUBSCRIPTION DETAILS SynapX Premium is an auto-renewable subscription available as monthly and yearly plans. The price in your local currency is shown in the app before purchase. • Payment is charged to your Apple ID at confirmation of purchase • Subscription automatically renews unless canceled at least 24 hours before the end of the current period • Renewal is charged within 24 hours before the end of the current period • Manage or cancel your subscription in App Store account settings • Any Apple introductory offer terms, if available, are shown before purchase Privacy Policy: https://zephyranthess.github.io/SynapX/privacy_policy.html Terms of Use: https://zephyranthess.github.io/SynapX/terms_of_use.html
Screenshots
Verdict
The clearest difference is ads: SynapX at none against Dev Calc's shown. SynapX also leads on update cadence (every 4 days vs every 2 months). On price, in-app purchases, 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
Both are free to download. Dev Calc sells 1 in-app purchase, starting at $1.99 per month and SynapX sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Dev Calc ships an update every 2 months, SynapX every 4 days. Both last shipped on October 24, 2026.
| Parameter | Dev Calc | SynapX |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (2 ratings) — better | — |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 51 MB | 30 MB |
| Age rating | 4+ | 9+ |
| Developer | Toshiya Hondo | YASIN OZALP |
In-app purchases
Dev Calc
- Remove Ads (Monthly)$1.991 Month
SynapX
- SynapX Premium Monthly$9.991 Month
- SynapX Pro Yearly$79.991 Year









