Comparison

ReadingScreen vs onetest assessment

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

Head to head
About

ReadingScreen

Read full description

Accurately identify Primary school children who would benefit from reading support, using our fast, fun and intuitive app for teachers and teaching assistants. Based on decades of University of Oxford research into reading development. ReadingScreen assessments consist of two tests measuring different reading skills. The first presents pupils with up to 60 individual words of increasing complexity. The second presents them with up to 34 nonwords. The pupil is asked to read each word or nonword out loud and their responses are marked for accuracy by the adult conducting the assessment. If they get 15 answers in a row incorrect, the test ends and they move onto the next test. Each assessment should take 10 minutes or less to complete. Assessments can be interrupted if necessary and will resume from the beginning of the most recent test. To launch an assessment, the adult conducting the assessment should scan the QR code for the pupil they want to assess. No personally identifiable information is stored on the device. At the end of an assessment, the data is uploaded to oxedandassessment.com for instant feedback and reports can be generated for classes or year groups. If no internet connection is available, the data can be stored on the device and uploaded at a later date. ReadingScreen is suitable for schools and organisations (UK and international) using English or Welsh as the medium of education.

About

onetest assessment

Features
Read full description

What is onetest? onetest is a rapid digital assessment that gives a snapshot of a child’s level in literacy and numeracy. It gives both an overall score and scores for individual subskills in literacy and numeracy. Who is it for? onetest is for use by Ministries of Education, teachers, researchers and implementation partners. Ultimately though, onetest is for the child. When key stakeholders can rapidly determine children’s literacy and numeracy levels, appropriate action can be taken to make a change that will improve children’s learning outcomes as soon as possible. The goal of onetest is to bring positive change for the child and their learning outcomes, by identifying which interventions are working, whether that’s on a national level or within a single classroom. Languages onetest is currently available in: Chichewa, Swahili, French for West and Central Africa, Portuguese for Mozambique, International English and American English. More languages will follow. How has onetest been developed and tested? onetest has been developed in-house at onebillion, with input from education experts and with our years of experience developing learning solutions that work for the child. Each localisation is created with input from local pedagogy experts to ensure quality is maintained in each new language. We are working with research partners to validate onetest against existing assessments to ensure accuracy.

Screenshots

ReadingScreen4 screens
onetest assessment4 screens

Verdict

The call

The clearest difference is update cadence: ReadingScreen at every 2 months against onetest assessment's every 14 months. onetest assessment's advantage is iOS requirement (9.3 vs 15.1). 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

ReadingScreen ships an update every 2 months, onetest assessment every 14 months. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.

Scorecard2 real differences · 4 level
ReadingScreen versus onetest assessment: the parameters behind the verdict, then further details
ParameterReadingScreenonetest assessment
PriceFreeFree
Update frequencyEvery 2 months — betterEvery 14 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.19.3 — better
Further details — not scored
Size31 MB83 MB
Age rating4+4+
DeveloperOxEd and Assessment Ltdonebillion

In-app purchases

None

ReadingScreen

No in-app purchases

None

onetest assessment

No in-app purchases

Questions

Is ReadingScreen free?
ReadingScreen is free to download, with no in-app purchases.
Is onetest assessment free?
onetest assessment is free to download, with no in-app purchases.
Do ReadingScreen or onetest assessment have ads?
Neither ReadingScreen nor onetest assessment shows ads.
Which is updated more often, ReadingScreen or onetest assessment?
ReadingScreen ships an update every 2 months, and onetest assessment every 14 months. Most recently, ReadingScreen was updated on September 8, 2026 and onetest assessment on September 9, 2026.

Other comparisons