Comparison

SDカード R&W vs SimpleSigma

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

Head to head
About

SDカード R&W

Wirelessly back up photos, videos, and contacts from your iPhone or iPad. Browse and play media and documents stored on an SD card. Requires a separate wireless SD card reader and memory card.

Highlights
  • Wireless backup of iPhone/iPad photos, videos, and contacts
  • Browse and play SD card media (photos, videos, music)
  • View documents (Word, Excel, PDF)
  • Compact and portable design
  • Supports iOS 8.0-13
Features
Read full description

本アプリのご使用には、SoftBank SELECTION ワイヤレスSDカードリーダー&ライター(別売)が必要です。 iPhone、iPadのデータをワイヤレスで簡単バックアップ <主な特長> ・iPhone、iPadの写真やビデオ*1、連絡先を簡単にバックアップ ・スリムコンパクトボディで持ち運びに便利 ・SDカード内の写真、ビデオ、音楽、文書(Word、Excel、PDFなど)の閲覧・再生 *2 *1:カメラロールに保存されたデータのみ *2:一部ファイルの閲覧・再生ができない場合があります。 <対応OS>(2020年6月現在) iOS 8.0-13対応 ※本サービスは、2021年7月31日をもって終了させていただきます。  今後OSのアップデートについては、対応を行わない場合がございます。  あらかじめご了承ください。 <注意事項>  ・本アプリのご使用には、SoftBank SELECTION ワイヤレスSDカードリーダー&ライター(別売)が必要です。  ・本製品のご使用には、microSD/SDHC/SDXCメモリーカード(別売)が必要です。  ・ご使用の前に製品に同梱された取扱説明書をお読みいただき、正しくお使いください。

About

SimpleSigma

This app offers a versatile calculator with three distinct table types for various needs, from simple sums to complex quantity-based calculations. It features intuitive input, auto-saving, and CSV export. An optional Pro version removes ads, unlocks unlimited tables, and adds advanced statistics and OCR receipt scanning.

Highlights
  • Three distinct table types (Simple, Duplex, Shopping)
  • Auto-totaling and quick sum calculations
  • Swipe keyboard for cell navigation
  • CSV data export
  • Auto-save functionality
  • Optional Pro version with advanced features
Features
Read full description

■ About SimpleSigma A simple and powerful calculator app for everyday use. From shopping calculations to business tallies, SimpleSigma handles it all. Choose from 3 table types to match your needs. ■ Key Features Simple Table - Extremely simple input - Auto-totaling as you type - Quick sum calculation - Perfect for receipt scanning (Pro - Beta) Duplex Table - Multiply two values automatically - Great for area or unit price calculations - Subtotal display Shopping Table - Price x Quantity = automatic calculation - Custom tax rates - Subtotals at a glance Common Features for All Tables - Swipe keyboard up/down/left/right to move between cells - CSV export - Auto-save ■ Pro Version Benefits Upgrade to SimpleSigma Pro for more power: No Ads Work distraction-free Unlimited Tables Create as many tables as you need (Free: 3 max) Advanced Statistics - Period-based totals (Today, Week, Month, Year) - Daily trend charts - Type breakdown pie charts - Total, Average, Max, Min at a glance - CSV export AppleWatch supported - Simple Table, Sharing with iPhone Receipt OCR (Beta) - Scan receipts with camera - Auto-recognize total amounts - Best suited for Simple Table - Save time on manual entry Starting at $2.99/month Save more with yearly plan! ■ Perfect For - Quick shopping calculations - Business expense tracking - Visualizing spending patterns - Managing multiple projects separately - Ad-free focus ■ Highlights - Extremely simple input design - Swipe keyboard (up/down/left/right) for fast cell navigation - Native iOS interface - Auto-save results - CSV export for data portability - Japanese & English support ■ Free Version Includes - All 3 table types - Up to 3 tables - Core calculation features - Keyboard swipe navigation - CSV export ■ Privacy - All data stored locally on device - No external server uploads - Secure iOS backup ■ Support Questions or feedback? Contact us: applicast3@gmail.com Make calculations smarter with SimpleSigma. Download now and try Pro for full features! Terms of Service: https://gist.github.com/zekoo2026/892cbcbb08ec7a1ce6e54e370acf2b51 Privacy Policy: https://gist.github.com/zekoo2026/12756689700e4afa4c9295cc4e0ba244

Screenshots

SDカード R&W4 screens
SimpleSigma4 screens

Verdict

The call

The clearest difference is review sentiment: SimpleSigma at 67% against SDカード R&W's 6%. SimpleSigma also leads on update cadence (every 6 weeks vs every 8 months). SDカード R&W's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price and device support 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. SimpleSigma sells 2 in-app purchases, starting at $2.99 per month. SDカード R&W asks for nothing beyond the download.

UpkeepUpdate frequency

SDカード R&W ships an update every 8 months, SimpleSigma every 6 weeks. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

Scorecard6 real differences · 2 level
SDカード R&W versus SimpleSigma: the parameters behind the verdict, then further details
ParameterSDカード R&WSimpleSigma
PriceFreeFree
Positive reviews5.6% of reviews66.7% of reviews — better
Update frequencyEvery 8 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS8.0 — better26.0
Further details — not scored
Size17 MB7 MB
Age rating4+4+
DeveloperPanasonic Holdings CorporationMUTSUAKI KIKUCHI

Customer experience

SDカード R&W

Written reviews18 reviews
Positive5.6%
Neutral11.1%
Negative83.3%

SimpleSigma

Written reviews9 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

In-app purchases

None

SDカード R&W

No in-app purchases

2 purchases

SimpleSigma

Subscriptions2
  • SimpleSigma Pro (Monthly)$2.991 Month
  • SimpleSigma Pro (Yearly)$29.991 Year

Questions

Is SDカード R&W free?
SDカード R&W is free to download, with no in-app purchases.
Is SimpleSigma free?
SimpleSigma is free to download, with in-app purchases available.
Do SDカード R&W or SimpleSigma have ads?
SimpleSigma shows ads; SDカード R&W does not.
Which is updated more often, SDカード R&W or SimpleSigma?
SDカード R&W ships an update every 8 months, and SimpleSigma every 6 weeks. Most recently, SDカード R&W was updated on October 24, 2026 and SimpleSigma on October 7, 2026.

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