Comparison

SolverPad vs NumLens by OpenSquare

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

Head to head
About

SolverPad

Features
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SolverPad β€” Smart Notes with Live Calculations SolverPad makes everyday and technical calculations fast, clear, and natural. It’s 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 you’re 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.

About

NumLens by OpenSquare

Features
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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. ⌘ FEATURES ⌘ β–ͺ Scan phone numbers using camera β–ͺ Enter phone number manually β–ͺ Send WhatApp/Telegram/Viber/Signal messages without saving to Contacts β–ͺ Start phone call β–ͺ Add extracted numbers to Contacts β–ͺ Send SMS messages β–ͺ Share or Copy extracted phone numbers β–ͺ Simple & Clean design NumLens makes contacting people fast, accurate, and effortless, saving you time and keeping your Contacts clean.

Screenshots

SolverPad4 screens
NumLens by OpenSquare4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. SolverPad sells 1 one-off in-app purchase. NumLens by OpenSquare asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard4 real differences Β· 2 level
SolverPad versus NumLens by OpenSquare: the parameters behind the verdict, then further details
ParameterSolverPadNumLens by OpenSquare
PriceFreeFree
Update frequencyWeeklyEvery 3 days β€” better
AdsYesNo β€” better
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.1 β€” better17.0
Further details β€” not scored
Size34 MB20 MB
Age rating9+4+
DeveloperASAPP STUDIOAhmed Abdelkarim

In-app purchases

1 purchases

SolverPad

One-time1
  • Premium Version$0.99
None

NumLens by OpenSquare

No in-app purchases

Questions

Is SolverPad free?
SolverPad is free to download, with in-app purchases available.
Is NumLens by OpenSquare free?
NumLens by OpenSquare is free to download, with no in-app purchases.
Do SolverPad or NumLens by OpenSquare have ads?
SolverPad shows ads; NumLens by OpenSquare does not.
Which is updated more often, SolverPad or NumLens by OpenSquare?
SolverPad ships an update weekly, and NumLens by OpenSquare every 3 days. Most recently, SolverPad was updated on September 20, 2026 and NumLens by OpenSquare on September 17, 2026.

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