SolverPad vs NumLens by OpenSquare
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SolverPad
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SolverPad β Smart Notes with Live Calculations SolverPad makes everyday and technical calculations fast, clear, and natural. Itβs a smart notepad with a built-in calculator, designed for people who think with numbers. Write notes the way you normally do β SolverPad instantly calculates results right inside your text. No switching apps. No copying numbers. Just notes that calculate themselves. --> Write Notes. See Results Instantly. Type regular notes like: Rent = 1200 Utilities = 150 Groceries = 400 Total = Rent + Utilities + Groceries SolverPad instantly shows the total next to your notes β clean, readable, and always up to date. Change any value, and every related calculation updates automatically. Your notes stay accurate without redoing anything. --> Variables That Update Everywhere Define values once and reuse them across your notes: hourly_rate = 25 hours = 40 weekly_pay = hourly_rate * hours Update a single number, and SolverPad recalculates everything that depends on it β instantly. Perfect for: * Budgets & expenses * Project estimates * Study notes & formulas * Freelance & hourly work tracking --> Smart Math That Feels Natural SolverPad supports: * Percentages (e.g. 20% of 500, 1000 minus 15%) * Multi-line calculations with clear step-by-step results * Unit conversions (distance, weight, time, temperature) * Clean formatting that looks like notes, not spreadsheets Your calculations appear exactly where they matter β subtle, readable, and distraction-free. --> Why SolverPad Is Different Most note apps treat numbers as plain text. Calculator apps force you to jump back and forth. SolverPad combines both β so numbers and ideas live together. No broken workflows. No lost momentum. Just smooth thinking. --> Key Features * Live calculations as you type * Automatic updates when values change * Variable support for reusable values * Percentages and unit conversions * Multi-line calculations with clear results * Clean, minimal, distraction-free design * Works offline --> Perfect For * Students & teachers * Developers & engineers * Budgeting & expense tracking * Project planning & estimates * Quick math and daily calculations Whether youβre planning finances, solving problems, or exploring ideas β SolverPad makes numbers and notes work together beautifully. --> Premium Upgrade Upgrade to SolverPad Premium to enjoy a completely ad-free experience and support ongoing development.
NumLens by OpenSquare
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Without saving a phone number in your Contacts, NumLens will help you contact that number on messaging apps (WhatsApp, Telegram, Viber, Signal, etc.). Save scanned numbers in Contacts, make phone call, send SMS, share them anywhere, copy numbers, and more interesting features. You can use NumLens anywhere to quickly extract phone numbers: β£ Restaurant menu: Scan numbers, start phone call to request an order. β£ Supermarket: Scan printed payment number, copy it to pay your bill. β£ Hospital / Clinic: Scan communication number, send required documents on WhatsApp. β£ Unsaved contact / Business card: Share contact to NumLens, and enjoy all its features. β£ Image / Screenshot: Share image to NumLens to extract phone numbers in it. β£ Pharmacies, Shops, etc: Scan phone numbers, add them to Contacts to contact them later. β FEATURES β βͺ Scan phone numbers using camera βͺ Enter phone number manually βͺ Send WhatApp/Telegram/Viber/Signal messages without saving to Contacts βͺ Start phone call βͺ Add extracted numbers to Contacts βͺ Send SMS messages βͺ Share or Copy extracted phone numbers βͺ Simple & Clean design NumLens makes contacting people fast, accurate, and effortless, saving you time and keeping your Contacts clean.
Screenshots
Verdict
The clearest difference is in-app purchases: NumLens by OpenSquare at none against SolverPad's 1. NumLens by OpenSquare also leads on ads (none vs shown) and update cadence (every 3 days vs weekly). SolverPad's advantage is iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. SolverPad sells 1 one-off in-app purchase. NumLens by OpenSquare asks for nothing beyond the download.
SolverPad ships an update weekly, NumLens by OpenSquare every 3 days. The most recent releases landed on September 20, 2026 and September 17, 2026 respectively.
| Parameter | SolverPad | NumLens by OpenSquare |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 3 days β better |
| Ads | Yes | No β better |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, iPod β better | iPhone, iPad |
| Requires iOS | 15.1 β better | 17.0 |
| Further details β not scored | ||
| Size | 34 MB | 20 MB |
| Age rating | 9+ | 4+ |
| Developer | ASAPP STUDIO | Ahmed Abdelkarim |
In-app purchases
SolverPad
- Premium Version$0.99
NumLens by OpenSquare
No in-app purchases
Questions
Is SolverPad free?
Is NumLens by OpenSquare free?
Do SolverPad or NumLens by OpenSquare have ads?
Which is updated more often, SolverPad or NumLens by OpenSquare?
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