Evo by Ozobot vs DERS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Evo by Ozobot
This app serves as a companion for learning and creating with a robot companion. It provides access to coding tools, classroom resources, and support to maximize the robot's capabilities for educational and home use.
- Learn with robot companion
- Create with robot companion
- Connect with robot companion
- Ozobot Blockly access
- Classroom resources
- FAQs and support
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Meet your go-to companion to learn, create and connect with Evo, all from your smartphone or tablet. For use at school or at home, the Evo App offers quick access to Ozobot Blockly, Classroom, FAQs and more to get the most out of your Ozobot experience.
DERS
This tool assesses the quality of learning environments for children aged 2.5 to 12. It measures environmental design and implementation against desired developmental outcomes, focusing on executive functions, literacy, and social-emotional growth.
- Measures learning environment quality
- Focuses on executive functions
- Assesses literacy development
- Evaluates social-emotional growth
- Research-based environmental attributes
- Classroom observation tool
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The DERS iOS app has been deprecated. New web based DERS is now available. http://www.ders-app.org for more info. The Developmental Environmental Rating Scale (DERS) measures the quality of learning environments offered in classrooms serving children between the ages of 2.5 and 12. It aligns environmental design and implementation with desired outcomes related to executive functions, literacy, and social-emotional development. The DERS consists of 60 research-based environmental attributes or observable behaviors (child and adult) aligned with five broad aspects of human development: initiation and concentration, inhibitory control, working memory, linguistic and cultural fluency, and social fluency and emotional flexibility. The assessment is administered in a 60-minute classroom observation, during which the assessor records the presence, magnitude, and/or frequency for each item. Schools can use the DERS internally to identify priorities for continuous improvement or externally as an assessment of environmental quality. The DERS was developed by researchers at the National Center for Montessori in the Public Sector.
Screenshots
Verdict
The clearest difference is rating: DERS at 5.0 against Evo by Ozobot's 4.6. Evo by Ozobot's advantage is ratings volume (1.1K vs 4) and update cadence (every 2 months vs every 5 months). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
DERS holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Evo by Ozobot has 1.1K ratings behind it against 4, so its average is the more settled of the two.
Evo by Ozobot ships an update every 2 months, DERS every 5 months. The most recent releases landed on November 2, 2026 and October 29, 2026 respectively.
| Parameter | Evo by Ozobot | DERS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (1.1K ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 66.0% of reviews | — |
| Number of ratings | 1.1K — better | 4 |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 239 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Evollve, Inc. | National Centre for Montessori in the Public Sector, Inc. |
Customer experience
Evo by Ozobot
DERS
Bugs and requests
Evo by Ozobot
Reported bugs
3 issues- Firmware update bricking Ozobot devices
- Inability to connect and calibrate Ozobot with the app
- Saved programs not working after app updates
Requested features
4 requests- Bring back removed features like customization, tricks, and accounts
- Add battery percentage indicator for Ozobot Evo
- Improve app navigation and make key functions more accessible
- Expand programming and coding capabilities
DERS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Evo by Ozobot
No in-app purchases
DERS
No in-app purchases
Questions
Is Evo by Ozobot free?
Is DERS free?
Which has better reviews, Evo by Ozobot or DERS?
Do Evo by Ozobot or DERS have ads?
Which is updated more often, Evo by Ozobot or DERS?
Other comparisons
