Comparison

Yellow Schedule vs TODO! Simple List

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

Head to head
About

Yellow Schedule

This powerful system streamlines appointment booking and client management with advanced SMS reminders, secure notes, and integrated payments. It offers 24/7 online booking and synchronizes with existing calendars, ensuring professional and efficient client interactions.

Highlights
  • Advanced SMS reminders with client replies
  • Secure client notes (CRM)
  • Integrated payment processing
  • 24/7 online booking from website
  • Calendar synchronization (Outlook/Google)
  • Group scheduling functionality
  • HIPAA compliance
Features
Read full description

YellowSchedule. Easiest and most powerful scheduling system in the world. Fast and Secure Scheduling (HIPAA Compliance). We streamline your entire appointments process, giving you more time to do what you do best. Features: - Advanced SMS text reminders (Now with client replies) - Greed Dot/Red Dot system. Easily see when clients confirm their attendance with an text message. - Securely keep client notes (CRM). - Advanced payments system allows you to easily gather payments from clients. - Take client bookings directly from your website! - Be available 24x7. - Get push notifications whenever you receive new appointments, client payments or messages from clients. - Track clients bookings, attendance history, payments, notes, communications. - Optional pincode security feature to prevent critical data getting into the wrong hands in the event of lost or stolen mobile device. - Ability to Synchronize with all other calendar systems Outlook/Google etc.. - Group Scheduling functionality. Security Features: - HIPAA compliance. - SSL encryption on all data transfer. - Client data encrypted on our dedicated database server. - Load balanced high availability application servers for reliability and speed. - High powered dedicated hardware protected by dedicated firewall. - Advanced RAID storage devices. - Database replication system (combined with regular scheduled backups!) to protect against data loss. Customer Testimonials: "Clients love it. I continue to see an excellent show rate; over 90% now. No-shows are rare any more" -Catherine Rosick, Counselor. Scotsdale, AZ "I'm really impressed with this scheduling tool. I saw patients confirm within seconds of being scheduled in for their appointment." "I can really relax now knowing YellowSchedule, my 'online secretary', is on the job!" -Summer Allan Wilson, Clinical Social Worker. Dallas, TX. "I'm loving YellowSchedule. I started after a mix up with appointment times which meant I lost business and haven't looked back!" -Leah Bevan, Hypnotherapist. Plymouth, UK "Yellowschedule streamlined my appointments in a professional manner. Patients appreciate the convenience and flexibility of the system. The burdens of phone tag and missed appointments are a thing of the past. I only wish I had used this service sooner." Osiris Wade, Psychotherapist. Dallas, Tx

About

TODO! Simple List

Features
Read full description

Fast TODO list. A fast and convenient program for managing lists of items or tasks. More details: • Create lists with items to take / tasks. • Ability to mark and unmark taken items / tasks. • Progress bar - shows the current status of the list.

Screenshots

Yellow Schedule4 screens
TODO! Simple List4 screens

Verdict

The call

The clearest difference is ads: Yellow Schedule at none against TODO! Simple List's shown. Yellow Schedule also leads on update cadence (monthly vs every 5 months) and iOS requirement (9.0 vs 16.4). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Yellow Schedule ships an update monthly, TODO! Simple List every 5 months. Both last shipped on October 3, 2026.

Scorecard3 real differences · 7 level
Yellow Schedule versus TODO! Simple List: the parameters behind the verdict, then further details
ParameterYellow ScheduleTODO! Simple List
PriceFreeFree
Rating2.0 (8 ratings) — better—
Positive reviews16.7% of reviews—
Number of ratings8 — better—
Update frequencyMonthly — betterEvery 5 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better16.4
Further details — not scored
Size10 MB47 MB
Age rating4+4+
DeveloperYellow Schedule LtdArkadiusz Ilkow

In-app purchases

None

Yellow Schedule

No in-app purchases

None

TODO! Simple List

No in-app purchases

Questions

Is Yellow Schedule free?
Yellow Schedule is free to download, with no in-app purchases.
Is TODO! Simple List free?
TODO! Simple List is free to download, with no in-app purchases.
Do Yellow Schedule or TODO! Simple List have ads?
TODO! Simple List shows ads; Yellow Schedule does not.
Which is updated more often, Yellow Schedule or TODO! Simple List?
Yellow Schedule ships an update monthly, and TODO! Simple List every 5 months. Most recently, Yellow Schedule was updated on October 3, 2026 and TODO! Simple List on October 3, 2026.

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