Comparison

ABC Observe vs TODO

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

Head to head
About

ABC Observe

This tool simplifies behavior observation and data collection for understanding why behaviors occur. It helps in functional behavior assessments, progress monitoring, and behavior intervention plan development. Analyze frequency, duration, and ABC data, then export results in various chart formats.

Highlights
  • Simultaneous frequency, duration, and ABC data collection
  • Export data as CSV, charts, and ABC graphs
  • Save and share observation templates
  • Functional Behavior Assessment (FBA) support
  • Intervention progress monitoring
  • Behavior Intervention Plan (BIP) development
Features
Read full description

Behavior serves a purpose! Need to understand why a behavior occurs or the events that surround it, then the ABC Observation Made Easy app is right for you. The ABC Observation Made Easy app was created by a Licensed Educational Psychologist and School Psychologist from Santa Monica, California to simplify data collection, display presentation, and to improve data analysis. This app can be used as a part of a functional behavior assessment (FBA), intervention progress monitoring system, behavior modification process, and is useful for behavior intervention plan (BIP) development and implementation. Users can examine many dimensions of a behavior by simultaneously collecting frequency, duration, and ABC data over a single observation session or over multiple days. Results can be exported as raw data through a CSV file, as a frequency & duration chart, ABC bar graph, and/or as a completed ABC chart. Observation templates can be saved for future use and shared across multiple devices. Pricing Plans: 1 week unlimited trial (No subscription required) $1.99 per month $17.99 per year $79.99 forever edition For more information check out www.ABCObserve.com

About

TODO

Organize your day with tasks, notes, reminders, and time tracking. Break down projects into steps and plan your schedule with a calm, focused interface. Securely sync your data across devices and the web.

Highlights
  • Tasks, notes, reminders, and due dates
  • Break tasks into steps
  • Recurring tasks
  • Built-in time tracking
  • Drag-and-drop daily planning
  • File attachments
  • Color-coded Zones
  • Shared tasks and collaboration
Features
Read full description

Free, for good Everything you need day to day is free — forever, with no trial and no catch: tasks, steps, notes, reminders, recurring tasks, time tracking, attachments, Zones, calendar, sync across your devices and the web. No feature you rely on is ever taken away. Premium is there only if you want more of it: unlimited attachments and larger files, several timers at once, shared Zones, custom zone icons. Everything you need to stay organized • Tasks, notes, reminders and due dates • Break tasks into manageable steps • Flexible recurring tasks • Built-in time tracking, with a report you can print or save as PDF • Drag-and-drop daily planning • File attachments • Color-coded Zones • Shared tasks and collaboration • CSV import from other to-do apps • Secure cloud sync with your account A calmer way to plan Many task managers try to motivate you with urgency, streaks and constant notifications. TODO-ish takes a quieter approach. The interface stays out of your way so you can focus on what matters, finish what you planned, and then get back to living your life. Your data stays under your control Sign in with Email, Apple or Google, or start immediately in Guest Mode. Protect your tasks with Face ID or Touch ID. When you sign in, your data is securely synchronized across your devices. Your tasks also open in any browser — same account, same data. Whether you're planning a complex project or simply trying to remember to buy groceries, TODO-ish gives you one calm place to keep everything together. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://it4music.com/privacy-policy/

Screenshots

ABC Observe4 screens
TODO4 screens

Verdict

The call

The clearest difference is ratings volume: ABC Observe at 36 against TODO's 1. ABC Observe also leads on iOS requirement (12.0 vs 15.0). TODO's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, rating, review sentiment and ads 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. ABC Observe sells 3 in-app purchases, starting at $1.99 per month and TODO sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

TODO holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ABC Observe has 36 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

ABC Observe ships an update every 5 weeks, TODO every 2 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
ABC Observe versus TODO: the parameters behind the verdict, then further details
ParameterABC ObserveTODO
PriceFreeFree
Rating4.8 (36 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings36 — better1
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size52 MB85 MB
Age rating4+4+
DeveloperZhanna ShekhtmeysterSound Zone Trade LLC

Customer experience

ABC Observe

All ratings36 ratings
Positive94.4%
Neutral2.8%
Negative2.8%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

TODO

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

ABC Observe

Subscriptions2
  • Monthly Subscription$1.991 Month
  • Yearly Subscription$17.991 Year
One-time1
  • Forever Edition$79.99
2 purchases

TODO

Subscriptions2
  • Premium Monthly7 Days trial$3.991 Month
  • Premium Yearly7 Days trial$34.991 Year

Questions

Is ABC Observe free?
ABC Observe is free to download, with in-app purchases available.
Is TODO free?
TODO is free to download, with in-app purchases available.
Which has better reviews, ABC Observe or TODO?
TODO is rated higher. ABC Observe averages 4.8 out of 5 from 36 ratings, while TODO averages 5.0 from 1 ratings.
Do ABC Observe or TODO have ads?
Neither ABC Observe nor TODO shows ads.
Which is updated more often, ABC Observe or TODO?
ABC Observe ships an update every 5 weeks, and TODO every 2 weeks. Most recently, ABC Observe was updated on November 7, 2026 and TODO on October 31, 2026.

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