Comparison

Otto AR vs Lectio

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

Head to head
About

Otto AR

Features
Read full description

Meet Otto, your owl guide to the Robin and Doug Shore Innovation Center at Kennesaw State University. Otto AR turns a walk through the building into an interactive augmented-reality tour. Explore 18 stops across three floors. At each research lab, scan Otto’s marker and watch 3D models of the work happening inside come to life, from biomedical devices to energy, cybersecurity, and infrastructure. Otto explains what each lab does, quizzes you to test what you learned, and hands out badges as you go. 18 stops to explore across three floors Collect all 9 Otto owls, one at each research lab 3D augmented-reality models at every stop Otto narrates the tour with voice guidance Quick quizzes and mini-games so you actually remember what you saw Complete the Parliament to earn your badge Solo or team modes: explore at your own pace or race a friend No account required and no personally identifying information collected, just anonymous usage data that helps improve the tour. Point your phone and explore. Built for visitors to the Shore Innovation Center at Kennesaw State University.

About

Lectio

Read full description

Your notes, in your ears. Lectio turns your study material into a chaptered audio lecture. Upload a PDF, a slide deck, a YouTube link, a photo of your notebook or a web page, and start listening after a short wait. You can also record the class yourself. LISTEN β€’ Chapter-by-chapter narration with a transcript that follows the audio β€’ Background playback β€” screen off, walking, on the bus β€’ Up to double speed MAKE IT STICK β€’ An automatic quiz the moment the lecture ends, with an explanation for every question β€’ Flashcards and a spaced review queue β€” enter an exam date and the reviews tighten toward it β€’ Cheat sheet: the lecture's key ideas on one screen KEEP GOING β€’ Daily listening goal, streak and XP β€’ Sort lectures into courses; the home screen builds a mix from the course of your nearest exam PRO β€’ Many more lectures per month β€’ Ask the lecture: questions are answered from that lecture's own content β€’ Upload your own recording, and choose the narration voice and difficulty The free plan makes 3 lectures a month. Pro is offered monthly and yearly, current prices are shown in the app, and fair use is capped at 35 lectures a month. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends; manage or cancel them in your Apple Account settings. Available in English and Turkish. Terms of Use: https://akaiprod.github.io/lectio-site/en/terms.html Privacy: https://akaiprod.github.io/lectio-site/en/privacy.html

Screenshots

Otto AR3 screens
Lectio4 screens

Verdict

The call

The clearest difference is in-app purchases: Otto AR at none against Lectio's 2. Lectio's advantage is update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Lectio sells 2 in-app purchases, starting at $7.99 per month. Otto AR asks for nothing beyond the download.

UpkeepUpdate frequency

Otto AR ships an update every 2 weeks, Lectio every 4 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

Scorecard2 real differences Β· 4 level
Otto AR versus Lectio: the parameters behind the verdict, then further details
ParameterOtto ARLectio
PriceFreeFree
Update frequencyEvery 2 weeksEvery 4 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details β€” not scored
Size418 MB64 MB
Age rating4+4+
DeveloperKSURSFTurhan Anil Unkaya

In-app purchases

None

Otto AR

No in-app purchases

2 purchases

Lectio

Subscriptions2
  • Pro Monthly$7.991 Month
  • Pro Yearly7 Days trial$39.991 Year

Questions

Is Otto AR free?
Otto AR is free to download, with no in-app purchases.
Is Lectio free?
Lectio is free to download, with in-app purchases available.
Do Otto AR or Lectio have ads?
Neither Otto AR nor Lectio shows ads.
Which is updated more often, Otto AR or Lectio?
Otto AR ships an update every 2 weeks, and Lectio every 4 days. Most recently, Otto AR was updated on October 31, 2026 and Lectio on November 10, 2026.

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