TallyFlex vs Behavior Observer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TallyFlex
This app replaces paper data sheets for behavioral data collection. It helps professionals like BCBAs and RBTs work faster and more accurately with clients in clinics, schools, and homes. It offers various tracking methods and secure data export for reports.
- Replace paper data sheets
- Track ABC data, frequency, duration, latency
- Automatic timers for interval recording
- Task analysis and prompt codes
- Track multiple behaviors simultaneously
- Export data to PDF, CSV, XLSX
- Works offline
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Collect behavior and skill data, review progress, and prepare reports in one app. TallyFlex brings behavior and skill data, progress graphs, session notes, and reports together for BCBAs, RBTs, special education teachers, and other professionals. Collect during the session Track behavior and skills with frequency, duration, latency, percent correct, interval recording, and momentary time sampling. Record ABC data, break skills into task-analysis steps, and document prompt levels. Review session details Review a session’s collected data, graph, recorded events, and saved notes in one service record. Expand the event timeline to follow the sequence of recorded events. Follow progress over time Review progress graphs and add annotations for changes such as staffing or schedule updates. Organize programs into phases and targets to keep the skills you are working on connected. Bring clear reports to your next review Create PDF reports with graphs and summaries. Review session notes in a Notes Only report, or combine a day's service records, data summaries, timeline events, and notes in a Daily report. Export raw data to CSV or Excel. The Free plan includes core data collection, session notes, and basic CSV and Excel export. Programs, task analysis, prompt levels, full session timelines, and PDF reports require a paid subscription. Solo is a subscription for individual use, available through in-app purchase. Start collecting with TallyFlex. Questions? support@tallyflex.com Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Behavior Observer
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Behavior Observer makes data collection and analysis easy, with multiple observation types and organization for your caseload. Designed by a practicing school psychologist, this app knows the most important features and customizations that professionals need. Built for school psychologists, BCBAs, RBTs, behavior specialists, and special education staff. Generate instant reports to help with IEPs, FBAs, and clinical decisions. FIVE OBSERVATION METHODS, ONE APP Frequency — tap to record behavior counts Duration — time the length of multiple behaviors at once Time Sampling — momentary, partial-interval, whole-interval, and full BOSS (on task) scoring with peer comparison ABC — capture Antecedent/Behavior/Consequence to analyze behavior triggers and functions Latency — measure the time between a prompt and the student's response APPLE WATCH ENHANCEMENTS A silent wrist-buzz alerts you to interval timers. Tally frequency counts, run duration timers, repeat data entries, and capture latency right from the watch, synced live with your iPhone. Collect meaningful data without an obvious phone or clipboard in hand. CLINICALLY USEFUL DATA Drill down to the most essential behavior data needed to help your team make decisions (including peer comparisons and comprehensive reports capturing behavior patterns and functions). ANALYSIS & REPORTS BUILT IN Automatic charts for rates, percentages, trends over time, functional patterns, and duration breakdowns — plus clean, printable PDF reports that are meeting-ready. BUILT FOR REAL OBSERVATIONS Add mid-session notes and new behaviors on the fly Correct records during or after a session Customize banks for behaviors, antecedents, and consequences Backup data with manual or automatic file exports Export to Excel for full access to your data TRY EVERY METHOD FREE Download free and run real observations for one student with every method (5-minute session limit). Unlock unlimited observation time and students with Behavior Observer Pro: $49/year, or a one-time $149 lifetime purchase. Subscriptions are billed to your Apple ID, renew automatically unless canceled at least 24 hours before the period ends, and can be managed in App Store account settings. One price covers your entire caseload — no per-student fees. All data remains on your device Behavior Observer is from Helix Forms LLC. Questions or feature requests: HelixForms@gmail.com Privacy Policy: https://www.helixforms.com/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: TallyFlex at every 10 days against Behavior Observer's every 2 months. TallyFlex also leads on iOS requirement (15.0 vs 17.6). On price, ads, 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
Both are free to download. TallyFlex sells 2 in-app purchases, starting at $27.99 per month and Behavior Observer sells 2 in-app purchases, starting at $49.99 per year. Whichever you choose, the download price is not the number that matters.
TallyFlex ships an update every 10 days, Behavior Observer every 2 months. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.
| Parameter | TallyFlex | Behavior Observer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (87 ratings) — better | — |
| Positive reviews | 64.1% of reviews | — |
| Number of ratings | 87 — better | — |
| Update frequency | Every 10 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 87 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | TallyFlex LLC | Daniel Zaccaro |
Bugs and requests
TallyFlex
Reported bugs
13 issues- Calendar not showing current sessions
- Data export results in empty Excel sheet
- Calculations and percentages are unreliable
- Data stops being counted after a certain number of opportunities
- Exported data format for duration is hard to graph
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- Recent update messed up client info
- Data not transferring when emailed
- Feature to see current sessions in 'today' tab stopped working
- Account verification email not received
- App stuck on email verification screen
- Account temporarily disabled
- Cannot add students on free version
- Cannot upgrade account
Requested features
27 requests- Offer a 'lite' subscription for SLPAs/BCaBAs
- Add more data collection options/types (chaining, TAs, checklists)
- Allow uploading pre-made data sheets
- Add sound alerts for timers
- Ability to re-organize behaviors on screens
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- Track exemplars
- Add sub-goals under main goals
- Cold probe button/data collection
- Shared sessions/collaborative data collection
- Ability to add multiple students in one session
- Add prompts needed for a correct response
- macOS app that syncs
- Ability to add other team members for consistency
- Printable daily reports
- More descriptive session names or notes
- Export to CSV or Google Sheets
- Export raw data and graph
- Prompt required tracking
- Add descriptions to behaviors and option to show/hide
- Go back to list of behaviors and add current behaviors during session
- Website for help and learning
- Easier way to export data with graphs
- Time-stamped keystrokes for individual bouts
- Break down sessions further if needed
- Export qualitative notes
- Export session duration with time
- Shared location for a single student
Behavior Observer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TallyFlex
- TallyFlex Solo Monthly$27.991 Month
- Solo Yearly$279.991 Year
Behavior Observer
- Behavior Observer Pro$49.991 Year
- Behavior Observer Pro Lifetime$149.00
Questions
Is TallyFlex free?
Is Behavior Observer free?
Do TallyFlex or Behavior Observer have ads?
Which is updated more often, TallyFlex or Behavior Observer?
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