LessonNote vs K
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LessonNote
This tool helps educators document classroom lessons by tracking student interactions, capturing notes, and recording time spent in various learning modalities. It facilitates data-driven conversations to improve teaching and learning outcomes.
- Track student interactions and conversation duration
- Record handwritten notes and observations
- Capture photos of student work
- Measure time spent in different learning modalities
- Review data for student-focused discussions
- Ideal for peer observation and coaching
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LessonNote is an innovative classroom observation tool for documenting the flow of a lesson and its impact on students. Capture both quantitative and qualitative data: • Track who is talking to whom, when, and for how long. • Jot handwritten, time-stamped notes about what is being said and what students are doing. • Take photos of student work. • Capture time spent in different modalities: whole-class, individual work, group work. Begin by creating a seating chart with icons representing the teacher, students, groups, and display areas such as blackboards or projection screens. Record observations by selecting an icon, or linking two icons for a note about an interaction. Take photos of student work. After a lesson, efficiently review your data for a student-focused conversation that improves teaching and learning. A small seating chart shows exactly who or what a note is about, so you don't need to know the names of the students. A timeline shows how much time was spent in whole-class lecture or discussion, individual work time, and group work time. LessonNote helps you create a fact-based and non-judgemental record of the lesson and its impact on students. LessonNote is ideal for peer observation, coaching, instructional rounds, and of course for Lesson Study. For administrators, LessonNote improves on simple checklists or rating scales by helping document how lessons affect students—which is, ultimately, what teaching is all about. Work with your colleagues and use LessonNote to improve teaching and learning! Read the Terms of Service at: https://LSAlliance.org/LessonNote/terms-of-service.html.
K
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Observation Assistant helps K–12 educators turn classroom evidence into clear, coaching-ready feedback—on iPhone and on the web. Built by a practicing school administrator, Observation Assistant is designed for reflection and professional growth, not formal evaluation or employment decisions. WORK ON PHONE OR WEB • Same account on iOS and at app.observationassistant.com • Record on your phone, review and finish on your laptop—or the other way around • Sign in with email, Google, or Sign in with Apple TWO WAYS TO USE IT • Individual — observe and reflect on your own teaching • Observer — organize observations for multiple teachers in one place FROM RECORDING TO REPORT • Record classroom audio (3 minutes to 1 hour 40 minutes) • Attach lesson materials with photos or documents • Get a time-stamped transcript with automatic PII redaction • Generate summary and detailed coaching reports grounded in what happened in the room • Set teaching preferences (grades, subjects, experience) so feedback fits the classroom FAIR, TRANSPARENT PLANS • Plans are based on completed observations—not hidden tiers • Try 3 observations free over 14 days from your first recording • Monthly plans include rollover; annual plans grant the full year up front • Optional +25 observation packs never expire • See your remaining balance anytime in Settings PRIVACY BY DESIGN • Raw audio is deleted after successful transcription • Personally identifiable information is automatically redacted in transcripts • Your data is not used to train AI models • Data is encrypted in transit • Delete your account in Settings when you no longer need the service WHO IT'S FOR • Instructional coaches • School administrators • Teacher leaders and mentors • Reflective classroom educators Observation Assistant supports thoughtful teaching practice without replacing professional judgment. It helps you see your teaching more clearly—and talk about it with evidence. Terms: https://www.observationassistant.com/terms-conditions Privacy: https://www.observationassistant.com/english-privacy-policy
Screenshots
Verdict
The clearest difference is update cadence: K at every 10 days against LessonNote's monthly. 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. LessonNote sells 6 in-app purchases, starting at $29.99 per 3 months and K sells 1 in-app purchase, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
LessonNote ships an update monthly, K every 10 days. The most recent releases landed on September 13, 2026 and September 9, 2026 respectively.
| Parameter | LessonNote | K |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (10 ratings) — better | — |
| Positive reviews | 65.2% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Monthly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.4 |
| Further details — not scored | ||
| Size | 62 MB | 54 MB |
| Age rating | 4+ | 17+ |
| Developer | Lesson Study Alliance | Observation Assistant LLC |
In-app purchases
LessonNote
- 3 Months of Pro$29.993 Months
- 6 Months of Pro$44.996 Months
- 1 Year Pro$64.991 Year
- 6-month LessonNote Pro subscription$89.99
- 1-year LessonNote Pro subscription$149.99
- 2-year LessonNote Pro subscription$249.99
K
- Snapshot Monthly$9.991 Month









