Comparison

Date Formatter vs Instacalc.com

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

Head to head
About

Date Formatter

This utility helps developers easily test and understand date and time format strings. It allows for setting custom dates, time zones, and supports over 689 locales for localized formatting.

Highlights
  • Test any date/time
  • Set different time zones
  • Support for 689+ locales
  • Quick guide with examples
  • Detailed reference for format symbols
Features
Read full description

Have you ever felt a headache when dealing with date/time format string? When things come to a localized date/time format, it's even more difficult. Date Formatter is a handy tool for the developer who is dealing with date/time format string. It makes your life with date format easier! With this tool, you can test any format string with any date/time and see the result simultaneously. Never tweak format strings in code and run the program again and again. Features: - Set any date/time - Set different time zones - Support more than 689 locales (you can test date strings in any country your iOS device support) - Quick guide with examples - Detailed reference with the symbol, number of symbols, examples and descriptions Now, speed up with your work with date time string and localization!

About

Instacalc.com

This app bridges the gap between simple calculators and complex spreadsheets. It allows for natural language input, variables, and advanced functions, making calculations quick and easy to check. Share your calculations via a permalink.

Highlights
  • Natural language calculations
  • Variable and row support
  • Excel-style functions
  • Unit and currency conversions
  • Scientific and programming commands
  • Shareable calculation permalinks
Features
Read full description

Is a pocket calc too simple? Excel too much? Enter instacalc, the calc/spreadsheet sweet spot. Here's what users have to say: “I bleepin' love this site and I use it all the time. I especially love the simple variables and conversions.” “For quick ad-hoc calculations I like instacalc.com because: It's quick to write. It's free. It's less prone to mistakes and easier to check than Excel.” “An astonishing mixture between a simple calculator and a spreadsheet application.” Instacalc lets you... * Crunch numbers while seeing results in real-time * Use natural language (250k + 25%) * Use variables (profit = sales - cost) * Use excel-style functions (SUM, AVG, PMT...) * Use scientific and programming commands (trig, hex/bin, logical operators, if/else...) * Share a calc permalink with anyone (no login) * Use units (meters/feet, etc.) and currency, along with custom units * Dozens of more features (see below) If you login (free), the app syncs with the main instacalc.com website. Welcome to your new, favorite calculator. --- Here's a few more details on features: - Flexible Arithmetic: Easily manage calculations from "2 + 2 - 3" to complex expressions like "(3 * 5) / 2". - Instant Roots and Powers: Compute roots and powers in a snap, from "sqrt(9)" for square roots to "5^2" for exponents. - Master Percentages: Effortlessly calculate percentages, whether it's "5%", finding "17% of 200", or calculating "20 + 50%". - Modulo Operations: Solve "5 mod 3" quickly, perfect for programming and mathematical proofs. - Number Shortcuts: Speed through large numbers with shortcuts like "3.3k" or "200 million". - Scientific Notation Made Simple: Work with large values using entries like "1.234e3" or as simple as "1e-3". - Dynamic Variables & Rows: Create and manipulate variables "x = 9", and perform calculations across rows to streamline data analysis. - Comprehensive Unit Conversions: Convert "15 feet into inches" or complex rates like "15 miles/hour into feet/second". - Time and Date Wizardry: Calculate durations like "3 days in minutes" or perform timezone conversions "8pm PST in EST". - Advanced Financial Calculations: From loan payments using "PMT(rate, nper, pv)" to calculating the internal rate of return with "IRR(values)". - Statistical Tools: Analyze data using functions for variance "var(r1:r3)" or standard deviation "stddev(r1:r3)". - Trigonometry and Logarithms on the Go: Solve "sin(30)" or "log(2)" for both educational and professional uses. - Programming Made Easy: Tackle binary operations "bin(a = 3) and bin(a and b)", logical comparisons "2 * 2 > 3", and conditional statements. - Real-Time Financial Insights: Convert currencies "15 USD in EUR" and check real-time stock prices with "STOCK(AAPL)". Use Instacalc today and transform the way you handle calculations, whether for work, study, or daily life!

Screenshots

Date Formatter4 screens
Instacalc.com4 screens

Verdict

The call

The clearest difference is update cadence: Instacalc.com at every 2 weeks against Date Formatter's every 29 months. Instacalc.com also leads on ratings volume (3 vs 1). Date Formatter's advantage is iOS requirement (11.0 vs 16.4). On price, rating, ads and in-app purchases 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Date Formatter against 5.0 for Instacalc.com. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

UpkeepUpdate frequency

Date Formatter ships an update every 29 months, Instacalc.com every 2 weeks. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
Date Formatter versus Instacalc.com: the parameters behind the verdict, then further details
ParameterDate FormatterInstacalc.com
PriceFreeFree
Rating5.0 (1 ratings)5.0 (3 ratings)
Positive reviews—100.0% of reviews
Number of ratings13 — better
Update frequencyEvery 29 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better16.4
Further details — not scored
Size13 MB3 MB
Age rating4+4+
DeveloperHonghao ZhangKalid Azad

Customer experience

Date Formatter

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Instacalc.com

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Date Formatter

No in-app purchases

None

Instacalc.com

No in-app purchases

Questions

Is Date Formatter free?
Date Formatter is free to download, with no in-app purchases.
Is Instacalc.com free?
Instacalc.com is free to download, with no in-app purchases.
Which has better reviews, Date Formatter or Instacalc.com?
Date Formatter and Instacalc.com are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.
Do Date Formatter or Instacalc.com have ads?
Neither Date Formatter nor Instacalc.com shows ads.
Which is updated more often, Date Formatter or Instacalc.com?
Date Formatter ships an update every 29 months, and Instacalc.com every 2 weeks. Most recently, Date Formatter was updated on October 2, 2026 and Instacalc.com on October 3, 2026.

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