Comparison

GeyserLog vs Pocket Thesaurus

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

Head to head
About

GeyserLog

Features
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Display the latest geyser eruption data as collected by the GeyserTimes.org database. There are a number of tabs available: “Favorites”, where the user can select which features to watch. “Logbook”, the latest activity for each feature, with the most recent at the top. "Timeline", showing the latest reported activity. "Features", where showing every geyser and hot spring in the database. "Stopwatch" allows registered users to enter eruptions or notes into the database. Registered users can also use the app to edit their entries in the database. These will also show up in a "Submissions" tab. Optionally, predictions, when available, can be displayed for certain geysers. Notifications for window opening times can also be added. Notifications can also be requested for the eruptions of specific geysers, although this does not use Push Notifications and so isn't always timely. The iOS "GeyserLog-Today" lock screen widget has been retired. It has been replaced by a Recents widget, Favorites widget and a Predictions widget, which can be displayed in all three sizes. Dark Mode is also supported on iOS 13, and a red tinted "Night Mode" is still available. The primary screen allows you to choose four of the more common actions: Stopwatch, Recent Activity, Favorites and GrandWait. Stopwatch works in sync with the iPhone app stopwatch, allowing you to start, stop and pause, on either device. Recent Activity shows the latest dozen events posted to GeyserTimes Favorites shows the latest activity of those features that are shown in the iPhone app's Favorites view. GrandWait allows you to record events and activity without the need for using your iPhone screen in adverse conditions. There's also a small watch-face complication which will take you directly to the watch app, while saving the current time as an Observation. A rectangular complication will display the four most recent of your favorites.

About

Pocket Thesaurus

Expand your vocabulary and master the English language with this offline thesaurus. Quickly find synonyms and antonyms, explore word definitions, and enhance your writing and communication skills. Features include daily word challenges and advanced search options.

Highlights
  • Extensive offline access to 90,000+ words
  • Fast and efficient synonym/antonym search
  • Word of the Day/Week from GRE list
  • Advanced search with wildcards
  • Bookmark and search history
  • AI-powered word insights
  • Compact size, no full-screen ads
Features
Read full description

Unleash the power of words with Pocket Thesaurus, your ultimate offline companion for expanding your vocabulary and mastering the English language. Whether you're writing an essay, preparing for exams (GRE, TOEFL, IELTS), crafting a speech, or simply searching for the perfect word, Pocket Thesaurus puts a comprehensive, lightning-fast dictionary and study suite right in your pocket — 100% offline. _________________________________________________________________ FIND THE RIGHT WORD, EVERY TIME _________________________________________________________________ • Extensive Offline Database: Explore over 90,000 common words, synonyms, antonyms, and definitions without needing an internet connection. • Lightning-Fast Search: Instant results with typo-tolerant suggestions and wildcard search (* and ?) for words you aren't sure how to spell. • Synonym & Antonym Powerhouse: Explore related terms sorted by relevance and part of speech. Tap any word to dive deeper into its linguistic web. • American & British Variations: Automatically matches spelling variations (e.g., colour / color, analyse / analyze). _________________________________________________________________ POWERFUL VOCABULARY & STUDY TOOLS _________________________________________________________________ • 3D Flashcards: Boost retention using spaced repetition flashcards designed for rapid vocabulary building. • Vocabulary Quiz: Practice meanings, test your synonym mastery, and beat your personal high score with smart question rotation. • Word of the Day & Week: Curated vocabulary drawn from top academic word lists to level up your language day by day. • Daily Streaks: Build consistent study habits and track your learning streak. • Worldwide Word Map: Watch live vocabulary trends and see what words language enthusiasts are exploring around the globe. _________________________________________________________________ SMART & MODERN COMPANION _________________________________________________________________ • AI Lexical Assistant: Ask our AI assistant for deep nuances, historical etymology, sentence examples, or tailored grammar breakdowns. • Bookmarks & History: Save favorite terms into custom bookmarks and quickly review your recent searches. • Home Screen Quick Actions: Jump directly to Search, Random Word, Flashcards, or the Word Map right from your iPhone home screen. • Beautiful Dark & Light Theme: Designed for comfort with customizable font sizes, audio pronunciations, and native iOS Dark Mode support. • Distraction-Free: Lightweight and responsive, with zero full-screen popup ads interrupting your flow. Download Pocket Thesaurus today and discover the joy of finding the exact right word, every single time. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

GeyserLog4 screens
Pocket Thesaurus4 screens

Verdict

The call

The clearest difference is price: Pocket Thesaurus at Free against GeyserLog's $9.99. Pocket Thesaurus also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (15.0 vs 17.0). GeyserLog's advantage is in-app purchases (none vs 3) and ads (none vs shown). On 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

CostPrice · In-app purchases · Ads · Monetization

Pocket Thesaurus is free to download; GeyserLog costs $9.99 up front. Pocket Thesaurus sells 3 in-app purchases, starting at $0.99 per month. GeyserLog asks for nothing beyond the download.

UpkeepUpdate frequency

GeyserLog ships an update every 2 months, Pocket Thesaurus fortnightly. The most recent releases landed on October 2, 2026 and November 6, 2026 respectively.

Scorecard5 real differences · 5 level
GeyserLog versus Pocket Thesaurus: the parameters behind the verdict, then further details
ParameterGeyserLogPocket Thesaurus
Price$9.99Free — better
Rating—4.4 (585 ratings) — better
Positive reviews—62.2% of reviews
Number of ratings—585 — better
Update frequencyEvery 2 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, Apple TV, Apple Watch — betteriPhone, iPad, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size31 MB108 MB
Age rating4+4+
DeveloperHeinrich KoenigCONEM LABS INFOSYSTEMS LLP

Bugs and requests

GeyserLog

Not enough reviews yet to summarise bugs or requests.

Pocket Thesaurus

Reported bugs

4 issues
  • Search does not work
  • App freezes or crashes
  • Typing issues with keyboard
  • Inconsistent or incorrect search results

Requested features

5 requests
  • Add pronunciation feature
  • Improve search functionality
  • Provide option to remove ads
  • Expand word database with more complex vocabulary
  • Enhance user interface and design

In-app purchases

None

GeyserLog

No in-app purchases

3 purchases

Pocket Thesaurus

Subscriptions3
  • Pocket Thesaurus Premium7 Days trial$0.991 Month
  • Pocket Thesaurus Premium7 Days trial$4.996 Months
  • Pocket Thesaurus Premium1 Month trial$8.991 Year

Questions

Is GeyserLog free?
GeyserLog costs $9.99, with no in-app purchases.
Is Pocket Thesaurus free?
Pocket Thesaurus is free to download, with in-app purchases available.
Do GeyserLog or Pocket Thesaurus have ads?
Pocket Thesaurus shows ads; GeyserLog does not.
Which is updated more often, GeyserLog or Pocket Thesaurus?
GeyserLog ships an update every 2 months, and Pocket Thesaurus fortnightly. Most recently, GeyserLog was updated on October 2, 2026 and Pocket Thesaurus on November 6, 2026.

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