Comparison

The Number Line vs DA0

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

Head to head
About

The Number Line

This app allows users to visualize numbers on a number line and calculate the absolute difference between two numbers. It functions offline, making it accessible anytime and anywhere. Designed for ease of use and speed, it aims to be a go-to math tool.

Highlights
  • Number line visualization
  • Absolute difference calculator
  • Offline functionality
  • Intuitive interface
  • Fast operation
  • Supports positive and negative numbers
Features
Read full description

The iOS Number Line App was created in response to requests by visitors to our popular https://numbermaniacs.com website. Our visitors wanted a standalone application that does not require an Internet connection to locate numbers on a number line. In addition to showing numbers on a number line, this app also includes a calculator that can calculate the absolute difference between two numbers. This may be especially helpful when dealing with the absolute difference between a positive and a negative number. The Number Line App does not require an Internet connection, so you can use it anytime and anywhere. The goal was to make the app intuitive, clutter free, fast to operate, and easy to use. We hope the Number Line App will become one of your favorite math apps.

About

DA0

Features
Read full description

PASS YOUR COMPTIA DATA+ (DA0-001) EXAM Master data analytics concepts with 500+ practice questions designed to get you certified on your first attempt. 500+ practice questions 5-minute study sessions Track your progress Remove mastered questions Text-to-speech support Dark mode available WHY GET CERTIFIED? Data analytics professionals earn up to $203K annually (Skillsoft 2024). CompTIA Data+ validates your ability to transform raw data into actionable insights, making you indispensable to any data-driven organization. WHAT YOU'LL MASTER: • Star and snowflake schemas with fact tables, dimensions, and normalization tradeoffs • OLTP vs OLAP systems including transactional processing and analytical workloads • Relational vs non-relational databases covering SQL, document, key-value, and graph models • ETL vs ELT pipelines with extraction, transformation, and loading strategies • Data types and levels of measurement including nominal, ordinal, interval, and ratio • Data mining techniques including clustering, classification, and regression analysis • Data cleansing methods for deduplication, missing values, and outlier handling • Data profiling and quality validation with completeness, consistency, and accuracy checks • Data visualization best practices using bar charts, histograms, scatter plots, and heat maps • Data governance frameworks including metadata management, data stewardship, and lineage tracking • Structured, semi-structured, and unstructured data formats including JSON, XML, and flat files • Slowly changing dimensions with Type 1, Type 2, and Type 3 historical tracking methods • SQL operations including joins, subqueries, aggregations, and GROUP BY with HAVING clauses • Sampling methods covering simple random, stratified, cluster, and systematic techniques • Statistical analysis concepts including hypothesis testing, p-values, confidence intervals, and correlation STUDY ANYWHERE: Coffee breaks. Commutes. Lunch hours. Turn dead time into data analytics expertise. Download now. Pass your exam. Master data.

Screenshots

The Number Line4 screens
DA03 screens

Verdict

The call

The clearest difference is in-app purchases: The Number Line at none against DA0's 3. DA0's advantage is ads (none vs shown) and update cadence (every 3 months vs every 21 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DA0 sells 3 in-app purchases, starting at $3.99 per month. The Number Line asks for nothing beyond the download.

UpkeepUpdate frequency

The Number Line ships an update every 21 months, DA0 every 3 months. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 6 level
The Number Line versus DA0: the parameters behind the verdict, then further details
ParameterThe Number LineDA0
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 21 monthsEvery 3 months — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.615.0 — better
Further details — not scored
Size9 MB27 MB
Age rating4+4+
DeveloperH ValeurDavy Raitt

In-app purchases

None

The Number Line

No in-app purchases

3 purchases

DA0

Subscriptions2
  • Pro Monthly$3.991 Month
  • Pro Yearly7 Days trial$14.991 Year
One-time1
  • Pro Lifetime$19.99

Questions

Is The Number Line free?
The Number Line is free to download, with no in-app purchases.
Is DA0 free?
DA0 is free to download, with in-app purchases available.
Do The Number Line or DA0 have ads?
The Number Line shows ads; DA0 does not.
Which is updated more often, The Number Line or DA0?
The Number Line ships an update every 21 months, and DA0 every 3 months. Most recently, The Number Line was updated on October 15, 2026 and DA0 on October 14, 2026.

Other comparisons