Comparison

Fieldmark vs Opus English

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

Head to head
About

Fieldmark

Features
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Fieldmark from Electronic Field Notebooks allows you to create notebooks for structured data collection in the field while your team is offline. Developed to support a wide range of field-based disciplines, Fieldmark forms can be customised for your project to streamline data collection in the field. Collect data where there is no mobile or network connectivity and seamlessly upload data when you return to base. Fieldmark supports teams of data collectors using the same notebook on a project. Forms can include photographs, GPS locations (including from attached Bluetooth devices), free text and structured input fields, relations between multiple entries and more. Forms are fully customisable via our online web portal. After your field data collection exercise, data can be exported from our servers for import into your analysis tools or data repository. Export as CSV/Zip files or use our API to build an integration with your toolset.

About

Opus English

Features
Read full description

Opus English is a passionate team of tutors specialising in helping students unlock their fullest HSC English potential through state ranking guidance. Having been in your shoes not too long ago, we combine firsthand knowledge of how to succeed in English with a rigorously refined pedagogy to help our students reliably attain Band 6 (and even 95+) HSC English results. We pride ourselves in our role as mentors. As part of that, each and every single team member at Opus undertakes meticulous training to stay ahead of the curve on HSC trends and the most up-to-date syllabus-aligned content for your texts. ABOUT THE APP - Access your lesson materials, personalised program and schedule on the go - Tap into a library of video masterclasses distilling streamlined roadmaps on how you can ace each section of the exam - Pocket access to a bank of over 100 state ranking and 20/20 exemplar essays covering all your HSC texts Join the Opus community and write your HSC English success story today!

Screenshots

Fieldmark4 screens
Opus English4 screens

Verdict

The call

The clearest difference is update cadence: Fieldmark at every 3 weeks against Opus English's every 3 months. On price, ads, in-app purchases and device support 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Fieldmark ships an update every 3 weeks, Opus English every 3 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard1 real difference ยท 5 level
Fieldmark versus Opus English: the parameters behind the verdict, then further details
ParameterFieldmarkOpus English
PriceFreeFree
Update frequencyEvery 3 weeks โ€” betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPod
Requires iOS15.515.1 โ€” better
Further details โ€” not scored
Size33 MB75 MB
Age rating4+4+
DeveloperFAIMS ProjectOpus English Specialist Tuition

In-app purchases

None

Fieldmark

No in-app purchases

None

Opus English

No in-app purchases

Questions

Is Fieldmark free?
Fieldmark is free to download, with no in-app purchases.
Is Opus English free?
Opus English is free to download, with no in-app purchases.
Do Fieldmark or Opus English have ads?
Neither Fieldmark nor Opus English shows ads.
Which is updated more often, Fieldmark or Opus English?
Fieldmark ships an update every 3 weeks, and Opus English every 3 months. Most recently, Fieldmark was updated on November 7, 2026 and Opus English on October 30, 2026.

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