Comparison

Twin vs Certify

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

Head to head
About

Twin

Create 3D digital twins of your physical items using your iPhone or iPad. Seamlessly bring these models into your Apple Vision Pro environment for immersive experiences. Explore your creations with advanced filters and organization tools.

Highlights
  • Create 3D models using photogrammetry
  • View models in visionOS environments
  • Apply filters and colorways to models
  • Automatic syncing between Apple devices
  • Organize models with search and sorting
  • Browse and place models on Apple Vision Pro
Features
Read full description

Make digital twins of your stuff using Twin! Twin is the fastest way to create 3D models of things around you for use in visionOS. Want to see your keyboard while fully immersed in an Apple Vision Pro environment? Want to bring your desk decor into the world of spatial computing? Want to use photogrammetry to scan your things? Want to visualize your models in brand new ways on Vision Pro using Twin Pro Filters? Twin can help. To make a 3D model for use in visionOS, all you need to do is: 1. Use Twin on your Apple iPhone or Apple iPad to scan your item 2. Use Twin on your Apple Vision Pro to place your digital twin That's it! - Your Twin models will be visible even when fully immersed in a visionOS environment, scan in your keyboard and actually see what you're typing on - Your Twin models are created using photogrammetry so they keep their real-world size, bring your favorite things with you into visionOS - Your Twin models can create fun twists on your world, mix and match the real world and the virtual world to your heart's content Please note: • Scanning on iOS and iPadOS requires a device with LiDAR and an A14 Bionic chip or later – this generally means an Apple iPhone Pro released in 2020 or later, or an Apple iPad Pro released in 2021 or later • Models are not tracked, they are not linked to a real world object, and they are stationary – place the stationary Twin model over your stationary real-world objects or wherever you desire • You must be signed into the same Apple ID across your devices – sign into the same account on your Apple iPhone/Apple iPad that creates the scans as well as on your Apple Vision Pro to place the models Twin's Features: 1. Use the photogrammetry capabilities of Twin on iOS/iPadOS to create 3D models (photogrammetry models require a minimum of ten pictures and can use up to a maximum of 200 pictures, pictures must be taken from different angles) 2. Filter your models to bring them to life in entirely new ways – create new colorways or use a filter on your stuff that would be impossible in the real world 3. In the Twin app models are automatically synced between devices signed into the same Apple ID 4. Search, sort, favorite, and rename your 3D models to organize them the way you want 5. Browse your 3D models on your Apple iPhone/Apple iPad or truly see them come to life as you browse and place them in 3D on your Apple Vision Pro WARNING: Photogrammetry works well with some objects and doesn't work at all with other objects, failure to follow these guidelines may result in a failure to create 3D models from your objects. OBJECTS THAT WORK: Solid, non-reflective, evenly lit objects that are less than 4 feet in all dimensions (width, height, depth) OBJECTS THAT DO NOT WORK: Transparent, shiny, monochromatic, unvaried texture, casting shadows objects that are greater than 4 feet in any dimension (width, height, depth) Bring your physical world into your visionOS spatial computing digital world with Twin! Twin Pro Subscription There are some features only available to Twin Pro subscribers: - Ability to place more than one model simultaneously in Twin on Vision Pro - Ability to filter your models in Twin on Vision Pro - No commitment, cancel anytime Subscription Pricing and Terms Payment will be charged to the credit card connected to your Apple ID at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current subscription period. Your account will be charged for renewal within 24 hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Apple ID Subscriptions after purchase. Any unused portion of a free trial period will be forfeited if you purchase a subscription. Privacy Policy: https://1984.dev/Twin-Privacy.html Terms of Use: https://1984.dev/Twin-Terms

About

Certify

Features
Read full description

Need a certificate for a student, an employee, a team or a class in the next five minutes? Certify turns a few details into a classic, print-ready certificate PDF — no design app or template hunting. Choose a template, enter the recipient, the award or course, and who signs it, then create the PDF. Print it, share it or save it to Files. • FOUR TEMPLATES — Award (Certificate of Achievement), Diploma, Completion (Certificate of Completion) and Participation (Certificate of Participation), each with matching wording such as “has successfully completed”. • YOUR OWN HEADING — keep the standard title or type your own, like “Employee of the Month” or “Star Reader”. • THE DETAILS THAT MATTER — recipient name, award or course title, an optional organization name and a date written any way you like. • SIGNATURE LINE — the signer's name and title under a signature line (or “Authorized signature” if you leave the title blank), next to the date. • CLASSIC LOOK — landscape US Letter with a double border, corner ornaments, warm gold accents and a seal emblem, ready for card stock or plain paper. • PRINT, SHARE OR SAVE — one tap to print, share or save the PDF to Files. Good to know: Certify uses a single classic design — there are no custom colors, fonts, logos or photos — and a pasted list of names becomes one PDF with a certificate per name. Sign it by hand after printing. Everything is created on your iPhone — nothing is uploaded and no account is needed. Try it free — 3 certificate exports. A one-time $4.99 purchase unlocks unlimited certificates. No subscription, no ads. Questions: overlapmarr@gmail.com

Screenshots

Twin4 screens
Certify3 screens

Verdict

The call

The clearest difference is device support: Twin at 3 against Certify's 1. On price, update cadence, ads and in-app purchases 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. Twin sells 2 in-app purchases, starting at $1.99 per month and Certify sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Twin ships an update fortnightly, Certify weekly. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.

Scorecard1 real difference · 9 level
Twin versus Certify: the parameters behind the verdict, then further details
ParameterTwinCertify
PriceFreeFree
Rating4.0 (4 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings4 — better—
Update frequencyFortnightlyWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Vision Pro — betteriPhone
Requires iOS17.016.0 — better
Further details — not scored
Size16 MB1 MB
Age rating4+4+
Developer1984 LLCJhomar Maravillas

In-app purchases

2 purchases

Twin

Subscriptions2
  • Pro Monthly$1.991 Month
  • Pro Annual$9.991 Year
1 purchases

Certify

One-time1
  • Unlock Unlimited$4.99

Questions

Is Twin free?
Twin is free to download, with in-app purchases available.
Is Certify free?
Certify is free to download, with in-app purchases available.
Do Twin or Certify have ads?
Neither Twin nor Certify shows ads.
Which is updated more often, Twin or Certify?
Twin ships an update fortnightly, and Certify weekly. Most recently, Twin was updated on October 5, 2026 and Certify on October 13, 2026.

Other comparisons