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.
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.
- 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
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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。
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.
- 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
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■ 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
Verdict
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
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.
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.
| Parameter | SDカード R&W | SimpleSigma |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 5.6% of reviews | 66.7% of reviews — better |
| Update frequency | Every 8 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 8.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 17 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Panasonic Holdings Corporation | MUTSUAKI KIKUCHI |
Customer experience
SDカード R&W
SimpleSigma
In-app purchases
SDカード R&W
No in-app purchases
SimpleSigma
- SimpleSigma Pro (Monthly)$2.991 Month
- SimpleSigma Pro (Yearly)$29.991 Year









