Comparison

Check Answer vs SiS4School

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

Head to head

Answer Sheet Reader

About

Check Answer

Features

Read full description

Turn your smartphone into an intelligent OMR scanner! Tired of manually grading answer sheets one by one? With Check Answer, you can grade dozens of exams in just minutes. Powered by advanced image processing, it is designed to be the most efficient and user-friendly tool for teachers and educators. Key Features That Set Us Apart: - Flexible Answer Key Templates: Create your own custom answer sheets effortlessly—whether it’s 20, 50, or 100 questions. Use "Grid Mode" to place marking points in seconds. - Precision Crosshair: Achieve pixel-perfect accuracy. Our aiming system ensures clear visibility even under your fingertip, eliminating any placement errors. - Snap & Grade (Instant Grading): Simply take a photo of the answer sheet. The system easily corrects image angles (Perspective Warp) and calculates scores instantly, highlighting correct answers in green and errors in red on your screen. - Adjustable Sensitivity Control: Supports both pencils and pens. You can manually adjust the detection threshold to ensure maximum accuracy in any lighting condition. - Results & History Tracking: Save student names and scores organized by subject. Access exam history anytime to monitor student progress over time. - Export Data (Pro Feature): Pro members can export scores as CSV files, ready for use in Excel, Google Sheets, or any school grading system. Perfect For: - Teachers of all levels (Primary, Secondary, University) - Tutors and Test Prep Centers - Corporate training and assessments - Start for FREE! - Create up to 3 templates and use all core features at no cost. Upgrade to Pro for unlimited templates and to unlock the data export feature. Download Check Answer today and take back your valuable teaching time! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

SiS4School

Features

Read full description

SiS4School ระบบบริหารงานโรงเรียนครบวงจร ออกแบบมาเพื่อโรงเรียนไทยโดยเฉพาะ สำหรับครู -เช็คชื่อนักเรียนประจำวันและตามตารางสอน -บันทึกคะแนนและผลการเรียน -ติดตามพฤติกรรมและความดีนักเรียน -งานครูที่ปรึกษา เยี่ยมบ้าน SDQ -จองห้องประชุม จองรถ แจ้งซ่อม -ยื่นใบลา ขอออกนอกโรงเรียน สำหรับนักเรียน -ดูตารางเรียน คะแนน และเกรด -สแกนเข้า-ออกด้วย QR Code -ยื่นใบลาออนไลน์ สำหรับผู้ปกครอง -ติดตามผลการเรียนบุตรหลาน -รับการแจ้งเตือนจากโรงเรียน -ลดงานเอกสาร เพิ่มประสิทธิภาพการทำงาน ทุกอย่างในแอปเดียว

Screenshots

Check Answer4 screens

SiS4School4 screens

Verdict

The call

The clearest difference is in-app purchases: SiS4School at none against Check Answer's 4. SiS4School also leads on iOS requirement (15.1 vs 18.6). Check Answer's advantage is update cadence (every 4 days vs every 2 weeks). On price, ads 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. Check Answer sells 4 in-app purchases, starting at $0.99 per month. SiS4School asks for nothing beyond the download.

UpkeepUpdate frequency

Check Answer ships an update every 4 days, SiS4School every 2 weeks. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 3 level

Check Answer versus SiS4School: the parameters behind the verdict, then further details
Parameter	Check Answer	SiS4School
Price	Free	Free
Update frequency	Every 4 days — better	Every 2 weeks
Ads	No	No
In-app purchases	Yes	No — better
Devices	iPhone, iPad	iPhone, iPad, iPod — better
Requires iOS	18.6	15.1 — better
Further details — not scored
Size	3 MB	42 MB
Age rating	4+	4+
Developer	Jatuphol Jaturapat	SIS SOFTTECH COMPANY LIMITED

In-app purchases

4 purchases

Check Answer

Subscriptions3

Unlimited use (1 Month)1 Month trial$0.991 Month
Unlimited Use (3 Months)$2.993 Months
Unlimited Use (1 Year)$4.991 Year

One-time1

Lifetime Access$12.99

None

SiS4School

No in-app purchases

Questions

Is Check Answer free?

Check Answer is free to download, with in-app purchases available.

Is SiS4School free?

SiS4School is free to download, with no in-app purchases.

Do Check Answer or SiS4School have ads?

Neither Check Answer nor SiS4School shows ads.

Which is updated more often, Check Answer or SiS4School?

Check Answer ships an update every 4 days, and SiS4School every 2 weeks. Most recently, Check Answer was updated on October 2, 2026 and SiS4School on October 3, 2026.