Comparison

OTL vs GriDot

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

Head to head
About

OTL

Easily search for all courses, view your daily schedule at a glance, and get notified about important academic dates. Organize your next semester's timetable, compare various metrics, and read and rate course reviews.

Highlights
  • Course search and filtering
  • Daily schedule overview
  • Academic event notifications
  • Timetable creation and comparison
  • Course review reading and rating
  • Personalized academic information
Features
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1. ํ™ˆ - ๋ชจ๋“  ๊ณผ๋ชฉ์„ ๋ฐ”๋กœ ๊ฒ€์ƒ‰ํ•˜์„ธ์š”. - ์˜ค๋Š˜ ๋‚˜์˜ ์‹œ๊ฐ„ํ‘œ๋ฅผ ํ•œ ๋ˆˆ์— ํ™•์ธํ•˜์„ธ์š”. - ์ˆ˜๊ฐ•์‹ ์ฒญ, ์ˆ˜๊ฐ•๋ณ€๊ฒฝ, ๊ฐœ๊ฐ•, ์ข…๊ฐ• ๋“ฑ ์ฃผ์š” ์ผ์ •์„ ์•Œ๋ ค๋“œ๋ฆฝ๋‹ˆ๋‹ค. 2. ์‹œ๊ฐ„ํ‘œ - ์ด๋ฒˆ ํ•™๊ธฐ ๋‚˜์˜ ์‹œ๊ฐ„ํ‘œ๋ฅผ ํ™•์ธํ•˜๊ณ  ์‚ฌ์ง„์œผ๋กœ ์ €์žฅํ•˜์„ธ์š”. - ์ผ๋ฐ˜, ์‹œํ—˜, ์ง€๋„์˜ 3๊ฐ€์ง€ ๋ชจ๋“œ๋กœ ์‹œ๊ฐ„ํ‘œ๋ฅผ ํ™•์ธํ•˜์„ธ์š”. - ๋‹ค์Œ ํ•™๊ธฐ ์‹œ๊ฐ„ํ‘œ๋ฅผ ๊ตฌ์„ฑํ•ด ๋ณด๊ณ  ํ•™์ , AU, ์„ฑ์ , ๋„๋„, ๊ฐ•์˜ ๋“ฑ ๋‹ค์–‘ํ•œ ์ง€ํ‘œ๋ฅผ ๋น„๊ตํ•˜์„ธ์š”. 3. ๊ณผ๋ชฉ์‚ฌ์ „ - KAIST์˜ ๋ชจ๋“  ๊ณผ๋ชฉ์„ ๊ฒ€์ƒ‰ํ•˜์„ธ์š”. - ํ•™๊ณผ, ๊ตฌ๋ถ„, ํ•™๋…„, ๊ธฐ๊ฐ„์œผ๋กœ ์†์‰ฝ๊ฒŒ ํ•„ํ„ฐ๋งํ•˜์„ธ์š”. 4. ๊ณผ๋ชฉํ›„๊ธฐ - ์ตœ๊ทผ ์ž‘์„ฑ๋œ ๋”ฐ๋ˆ๋”ฐ๋ˆํ•œ ๊ณผ๋ชฉํ›„๊ธฐ๋ฅผ ์ฝ์–ด๋ณด์„ธ์š”. - ๋ช…์˜ˆ์˜ ์ „๋‹น์— ์˜ค๋ฅธ ๊ณผ๋ชฉํ›„๊ธฐ๋“ค์„ ํ•™๊ธฐ๋ณ„๋กœ ํ™•์ธํ•ด ๋ณด์„ธ์š”. - ์œ ์šฉํ•˜๊ณ  ์žฌ๋ฏธ์žˆ๋Š” ๊ณผ๋ชฉํ›„๊ธฐ์— ์ข‹์•„์š”๋ฅผ ๋ˆŒ๋Ÿฌ์ฃผ์„ธ์š”. ๋‚ด ์ •๋ณด์—์„œ ํ•™๊ธฐ๋ณ„ ์ˆ˜๊ฐ•ํ•œ ๊ณผ๋ชฉ, ์ข‹์•„์š”๋ฅผ ๋ˆ„๋ฅธ ํ›„๊ธฐ๋“ค ๋“ฑ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ๋ฌธ์˜์‚ฌํ•ญ & ํ”ผ๋“œ๋ฐฑ otlplus@sparcs.org

About

GriDot

Features
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App features: โ€ข paper style > choose from grid, horizontal line, vertical line, dotted or none. โ€ข customisable paper size. โ€ข customisable paper colour. โ€ข customisable paper padding. โ€ข customisable cell size. โ€ข customisable border colour. โ€ข customisable border colour. โ€ข light theme / dark theme. โ€ข left mode / right mode. โ€ข re-create the file using history. โ€ข ready made template Supported languages (language is based on the your IPad's language setting): โ€ข Chinese โ€ข Englishย  โ€ข Japaneseย  โ€ข Korean For terms of use, please refer to Apple Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

OTL4 screens

Verdict

The call

The clearest difference is price: OTL at Free against GriDot's $2.99. OTL also leads on in-app purchases (none vs 2) and device support (3 vs 1). GriDot's advantage is iOS requirement (13.0 vs 15.0). On update cadence and ads there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

OTL is free to download; GriDot costs $2.99 up front. GriDot sells 2 in-app purchases, starting at $0.99 per month. OTL asks for nothing beyond the download.

UpkeepUpdate frequency

OTL ships an update every 5 weeks, GriDot monthly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard4 real differences ยท 4 level
OTL versus GriDot: the parameters behind the verdict, then further details
ParameterOTLGriDot
PriceFree โ€” better$2.99
Positive reviews92.9% of reviewsโ€”
Update frequencyEvery 5 weeksMonthly โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationFreeโ€”
DevicesiPhone, iPad, iPod โ€” betteriPad
Requires iOS15.013.0 โ€” better
Further details โ€” not scored
Size115 MB13 MB
Age rating9+4+
DeveloperSPARCSMing Rong Ng

In-app purchases

None

OTL

No in-app purchases

2 purchases

GriDot

Subscriptions2
  • Monthly Subscription$0.991 Month
  • Yearly$4.491 Year

Questions

Is OTL free?
OTL is free to download, with no in-app purchases.
Is GriDot free?
GriDot costs $2.99, and also offers in-app purchases.
Do OTL or GriDot have ads?
Neither OTL nor GriDot shows ads.
Which is updated more often, OTL or GriDot?
OTL ships an update every 5 weeks, and GriDot monthly. Most recently, OTL was updated on October 24, 2026 and GriDot on October 27, 2026.

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