Comparison

Sub Start Agency vs Systems Study

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

Head to head
About

Sub Start Agency

Read full description

Key Features: INSTANT SUB MATCHING --Quickly find the right substitute teachers. SEAMLESS BOOKING --Schedule, adjust, or cancel bookings anytime, anywhere. TEACHER PROFILE --View qualifications, experience, and real-time status before bookings. BOOKING OVERVIEW --Keep track of upcoming and past bookings in one place. EMAIL NOTIFICATIONS --Get real-time email updates on confirmations, changes, and cancellations. And there’s more to come! We’re continuously enhancing the Sub Start Agency App with new features to make substitute teacher management even easier. Download now and streamline your substitute teacher bookings!

About

Systems Study

Features
Read full description

Systems Study is a professional flight crew training app designed to help pilots review, reinforce, and retain Boeing 767 and Airbus A330 aircraft systems knowledge in a clean, distraction-free environment optimized for iPad use. Built specifically for initial, upgrade, and recurrent training, Systems Study presents aircraft systems information in an efficient flashcard format that supports both structured study sessions and quick-reference review. The app provides a simple and reliable way for pilots to strengthen technical knowledge outside the classroom. Features include: β€’ Boeing 767 and Airbus A330 systems study decks β€’ Organized study subjects by aircraft system β€’ Flashcard-based question and answer review β€’ Search function for rapid topic lookup β€’ Ability to mark difficult cards for additional review β€’ Dedicated Review Marked Cards mode β€’ Randomized card presentation for improved retention β€’ Optimized layout for iPad training environments β€’ Dark mode support β€’ Offline operation with no internet connection required Systems Study was developed with operational airline training in mind, allowing pilots to focus on understanding aircraft systems without unnecessary complexity or distractions. The streamlined interface supports productive study sessions during downtime, classroom breaks, hotel stays, commuting, and pre-training preparation. Whether used for initial qualification, recurrent training, upgrade preparation, or personal review, Systems Study provides a practical and efficient learning experience for professional flight crews. This application is intended as a supplemental study aid only and does not replace company-approved manuals, training programs, operating procedures, or regulatory guidance.

Screenshots

Sub Start Agency4 screens
Systems Study4 screens

Verdict

The call

The clearest difference is iOS requirement: Sub Start Agency at 15.0 against Systems Study's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sub Start Agency ships an update every 4 months, Systems Study every 2 months. Both last shipped on November 5, 2026.

Scorecard1 real difference Β· 5 level
Sub Start Agency versus Systems Study: the parameters behind the verdict, then further details
ParameterSub Start AgencySystems Study
PriceFreeFree
Update frequencyEvery 4 monthsEvery 2 months β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 β€” better17.6
Further details β€” not scored
Size61 MB4 MB
Age rating4+17+
DeveloperSubStartCraig Miller

In-app purchases

None

Sub Start Agency

No in-app purchases

None

Systems Study

No in-app purchases

Questions

Is Sub Start Agency free?
Sub Start Agency is free to download, with no in-app purchases.
Is Systems Study free?
Systems Study is free to download, with no in-app purchases.
Do Sub Start Agency or Systems Study have ads?
Neither Sub Start Agency nor Systems Study shows ads.
Which is updated more often, Sub Start Agency or Systems Study?
Sub Start Agency ships an update every 4 months, and Systems Study every 2 months. Most recently, Sub Start Agency was updated on November 5, 2026 and Systems Study on November 5, 2026.

Other comparisons