# ABA Data Notebook vs TallyFlex

The clearest difference is rating: TallyFlex at 4.3 against ABA Data Notebook's 3.3. TallyFlex also leads on update cadence (every 10 days vs monthly) and ratings volume (87 vs 9). ABA Data Notebook's advantage is in-app purchases (none vs 2) and iOS requirement (8.0 vs 15.0). On price, review sentiment and ads there is nothing between them.

Both are free to download. TallyFlex sells 2 in-app purchases, starting at $27.99 per month. ABA Data Notebook asks for nothing beyond the download.

TallyFlex holds the better App Store score, 4.3 against 3.3. That said, the two scores are not equally well evidenced: TallyFlex has 87 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 57% of ABA Data Notebook's written reviews are positive against 64% of TallyFlex's.

ABA Data Notebook ships an update monthly, TallyFlex every 10 days. The most recent releases landed on September 27, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | ABA Data Notebook | TallyFlex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (9 ratings)](https://appshunter.io/ios/app/aba-data-notebook/id1008564477/reviews) | **[4.3 (87 ratings)](https://appshunter.io/ios/app/tallyflex-aba-data-collection/id1531412972/reviews)** |
| Number of ratings | 9 | **87** |
| Positive reviews | 57.1% of reviews | **64.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 30 MB | 87 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Operant Systems Inc.](https://appshunter.io/developer/598392258) | [TallyFlex LLC](https://appshunter.io/developer/1531412974) |

## What reviewers say

### ABA Data Notebook

[App page](https://appshunter.io/ios/app/aba-data-notebook/id1008564477)

This app allows educators and therapists to track student skills and behaviors. It provides tools for defining behaviors, monitoring interventions, and generating reports. Data can be synced across devices and includes curriculum alignment with common assessment tools.

**Highlights:** Concurrent data collection for multiple students, Skills and behavior management, Graph and report generation, Define behaviors, antecedents, and consequences, Monitor interventions and assessments, Curriculum alignment with ABLLS, VB_MAPP, Cross-device data syncing

**Features:** macOS Compatibility

**In-app purchases:** none


### TallyFlex

[App page](https://appshunter.io/ios/app/tallyflex-aba-data-collection/id1531412972)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TallyFlex Solo Monthly | $27.99 | per month |
| Solo Yearly | $279.99 | per year |


## Frequently asked questions

### Is ABA Data Notebook free?

ABA Data Notebook is free to download, with no in-app purchases.

### Is TallyFlex free?

TallyFlex is free to download, with in-app purchases available.

### Which has better reviews, ABA Data Notebook or TallyFlex?

TallyFlex is rated higher. ABA Data Notebook averages 3.3 out of 5 from 9 ratings, while TallyFlex averages 4.3 from 87 ratings.

### Do ABA Data Notebook or TallyFlex have ads?

Neither ABA Data Notebook nor TallyFlex shows ads.

### Which is updated more often, ABA Data Notebook or TallyFlex?

ABA Data Notebook ships an update monthly, and TallyFlex every 10 days. Most recently, ABA Data Notebook was updated on September 27, 2026 and TallyFlex on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*