Comparison

Sudoku Coach vs Resfly

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

Head to head
About

Sudoku Coach

This app teaches you how to solve Sudoku puzzles by guiding you through logical steps and explaining techniques. It offers tiered hints, practice modes, and progress tracking to improve your skills. Unlock unlimited hints and advanced learning modes with a subscription.

Highlights
  • Smart, tiered hints
  • Clear explanations
  • Technique Learning mode
  • Pencil mark notes
  • Daily challenges
  • Progress tracking
Features
Read full description

Learn the logic behind your next Sudoku move. Stuck on a puzzle? Reveal hints one step at a time, understand why the move works, then make it yourself. Guided technique lessons help you learn from examples and practice making your own decisions, with hints available when you need them. On iPhone Duo, view the full puzzle, candidate notes and the current hint together on the inner display. Use the outer display for focused practice. • Learn from guided examples, then practice on your own. Selected lessons include a different puzzle to check your understanding. • Reveal hints in stages, so you can decide how much help you need. • Use candidate notes and Undo to follow the logic on the board. • Practice with daily challenges and regular puzzles. • Track completed lessons, moves solved on your own, and practiced techniques. • Resume saved puzzles with your notes. • Enter or paste your own Sudoku puzzle to practice. START WITH THE BASICS Naked Single, Hidden Single and Locked Candidates are free introductory techniques. A subscription unlocks the full Technique Learning library and unlimited puzzle hints. Weekly, monthly, and yearly subscription plans are available. Privacy Policy: https://sudoku.franklab.us/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Resfly

This app streamlines medical residency programs by centralizing schedules, training records, and communication for residents, faculty, and coordinators. It offers a glance at daily tasks, manages rotations, and facilitates conference participation and document tracking.

Highlights
  • Daily schedule overview
  • Rotation and conference management
  • Training record logging
  • Program-wide communication
  • Document management
  • Configurable reminders
Features
Read full description

ResFly connects residents, faculty, coordinators, and program leaders with the schedules, training records, and communication tools they use every day. The iPhone app works alongside the ResFly desktop app and web workspace, bringing your program’s information together wherever you work. YOUR DAY AT A GLANCE See upcoming tasks, alerts, conferences, on-call assignments, clinic schedules, and coverage from your Home dashboard. Access your personal schedule and training activities without switching between separate tools. SCHEDULING AND PROGRAM MANAGEMENT Use the desktop and web workspace to organize rotations, conferences, clinics, shifts, on-call schedules, jeopardy, night coverage, holidays, and time off. Review assignments, manage requests and schedule changes, and keep your team informed. Program dashboards bring important activity, outstanding work, and scheduling information into view. EXTERNAL ROTATIONS AND CONNECTED PROGRAMS Coordinate external rotations and visiting learners, connect participating programs, and manage shared rotation information, contacts, and requirements. Keep communication and scheduling organized across training locations. CONFERENCES AND PARTICIPATION View upcoming sessions, sign up for available conferences, submit presentation topics, and follow approval updates. Access conference details and materials, check in to eligible sessions, and track participation. TRAINING RECORDS AND DOCUMENTS Log work hours and procedures, complete evaluations, and review training progress. Keep program documents and records organized, with reminders for document expirations and outstanding requirements where configured. REMINDERS AND FOLLOW-UP Stay informed with program alerts and configurable reminders for conferences, sign-ups, rotation requirements, evaluations, work hours, documents, and other assigned tasks. Email and in-app notifications help you follow up on upcoming activities, pending requests, and items that need attention. Reminder availability and delivery depend on your program’s settings and notification preferences. IMPORTS AND AI INTEGRATIONS Bring existing member, scheduling, and training information into supported workflows using data-import tools in the desktop and web workspace. Optional AI integrations support enabled workflows, including drafting and refining program content, helping teams work with their information more efficiently. STAY CONNECTED Use program messages, notifications, and contact information to stay in touch with your team and keep up with changes throughout the training year. ResFly requires an account with a participating program. Available features, integrations, reminders, and administrative tools vary by program configuration, permissions, and platform. Some program-management features are available through the desktop app or web workspace.

Screenshots

Sudoku Coach4 screens
Resfly4 screens

Verdict

The call

The clearest difference is rating: Resfly at 5.0 against Sudoku Coach's 4.3. Resfly also leads on in-app purchases (none vs 3) and update cadence (daily vs every 3 weeks). On price, ratings volume, 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. Sudoku Coach sells 3 in-app purchases, starting at $0.99 per 7 days. Resfly asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Resfly holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

UpkeepUpdate frequency

Sudoku Coach ships an update every 3 weeks, Resfly daily. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 5 level
Sudoku Coach versus Resfly: the parameters behind the verdict, then further details
ParameterSudoku CoachResfly
PriceFreeFree
Rating4.3 (4 ratings)5.0 (2 ratings) — better
Number of ratings4 — better2
Update frequencyEvery 3 weeksDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS18.417.0 — better
Further details — not scored
Size18 MB42 MB
Age rating4+17+
DeveloperFeifei SongFADEL HANOUN

Customer experience

Sudoku Coach

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%

Resfly

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Sudoku Coach

Subscriptions3
  • SudokuCoach Weekly$0.997 Days
  • SudokuCoach Monthly3 Days trial$1.991 Month
  • SudokuCoach Yearly7 Days trial$9.991 Year
None

Resfly

No in-app purchases

Questions

Is Sudoku Coach free?
Sudoku Coach is free to download, with in-app purchases available.
Is Resfly free?
Resfly is free to download, with no in-app purchases.
Which has better reviews, Sudoku Coach or Resfly?
Resfly is rated higher. Sudoku Coach averages 4.3 out of 5 from 4 ratings, while Resfly averages 5.0 from 2 ratings.
Do Sudoku Coach or Resfly have ads?
Neither Sudoku Coach nor Resfly shows ads.
Which is updated more often, Sudoku Coach or Resfly?
Sudoku Coach ships an update every 3 weeks, and Resfly daily. Most recently, Sudoku Coach was updated on October 31, 2026 and Resfly on November 6, 2026.

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