Comparison

GAMMA AR vs Reedio

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

Head to head
About

GAMMA AR

Visualize 3D BIM models on construction sites using augmented reality. Compare real-world conditions with plans, detect errors early, and improve communication between site and office. Streamline workflows and reduce costs.

Highlights
  • Augmented reality BIM overlay
  • On-site construction monitoring
  • Error detection and prevention
  • Digital communication channels
  • Integration with Autodesk, Procore, BIMCollab
  • BIM model synchronization
Features
Read full description

GAMMA AR: Augmented Reality for Construction Site Management GAMMA AR is an application designed for monitoring construction sites. It utilizes augmented reality technology to overlay 3D Building Information Models (BIM) on construction sites using smartphones or tablets. With GAMMA AR, site managers, facility managers, craftsmen, and other stakeholders involved in the construction process can walk through the site and compare real-world conditions with the planning information contained in 3D BIM models. GAMMA AR enables the visualization of 3D BIM models before and during the construction process, thereby fostering a better understanding of the planning, preventing errors, and reducing construction costs. This enables site managers and planners from various disciplines (HLS, architecture, etc.) to collaborate on the construction site using the BIM model, preventing collisions and resolving ambiguities before they lead to errors. Additionally, GAMMA AR allows for the direct detection of errors within the BIM model, enabling adjustments to be made during the planning phase, preventing errors, and ensuring comprehensive monitoring of construction progress. Is GAMMA AR for you? GAMMA AR allows you to connect various software systems such as Autodesk, Procore, and BIMCollab. Construction site managers benefit from GAMMA AR by avoiding errors and eliminating the need to interpret 2D plans. Facility managers can report errors or make adjustments directly in the BIM model via GAMMA AR and transmit this information to other stakeholders involved in the construction process. GAMMA AR is an easy-to-use, intuitive tool that can be applied directly without requiring any training that could increase the cost of implementation. For construction companies, GAMMA AR offers significant benefits: entire departments can be relieved of the burden of communicating via 2D plans, which is no longer necessary. GAMMA AR establishes digital communication channels between the construction site and the office. Using BIM360 or Autodesk Construction Cloud (ACC)? Simply sign in with your Autodesk account, import your IFC, REVIT, and NAVISWORKS models into GAMMA AR, and synchronize your issues with BIM360, ACC, Procore, or BIMCollab. Summary Avoid Errors: Plans on-site are cumbersome and prone to errors! For many tasks, it is faster and safer to review the plans directly on a tablet and compare them with real-world conditions. By working digitally on tablets and smartphones, the reliance on paper plans is significantly reduced, thereby lowering the risk of obsolete information and redundancies. Sync Models and Notes with Your Office: With GAMMA AR, you can send issues directly from the construction site to the office. Each comment is directly linked to a building element or room during site inspections. With this location reference, new information is immediately integrated into the building model. This simplifies documentation and improves communication, as comments are clearly and unambiguously conveyed.

About

Reedio

This app allows users to read, annotate, edit, and organize PDF documents. It offers tools for highlighting, drawing, adding text, and managing pages. Advanced features include redaction, OCR, and measurement capabilities for professional document handling.

Highlights
  • PDF viewing and annotation
  • Insert images and text boxes
  • Redact sensitive information
  • Organize and reorder pages
  • Fill and sign forms
  • Scan documents with OCR
  • Measure distances and areas
Features
Read full description

Reedio is a powerful PDF reader and editor designed for professionals who need to work with documents efficiently. READ & ANNOTATE Highlight, underline, strikeout, draw freehand, add shapes, arrows, lines, and sticky notes. Mark up contracts, research papers, and reports with precision. EDIT Insert images, add hyperlinks, and place text boxes. Redact sensitive information permanently. Flatten annotations to preserve your markup when sharing. ORGANIZE Insert, delete, rotate, extract, and reorder pages. Append entire documents. Assemble the exact PDF you need. FILL & SIGN Add signatures, dates, checkmarks, stamps, and images directly to forms and agreements. SCAN & OCR Convert scanned documents into searchable, selectable text. MEASURE Calculate distances and areas on architectural drawings, floor plans, and technical documents FREE FEATURES: • PDF viewing • All annotation tools • Form filling • Signatures PRO FEATURES: • Edit (images, links, text boxes) • Redact & Flatten • OCR • Page organization • Measure • Priority support Terms of Use: https://reedio.io/terms Privacy Policy: https://reedio.io/privacy

Screenshots

GAMMA AR4 screens
Reedio4 screens

Verdict

The call

The clearest difference is in-app purchases: GAMMA AR at none against Reedio's 2. GAMMA AR also leads on ratings volume (8 vs 1). Reedio's advantage is rating (5.0 vs 4.6) and review sentiment (100% vs 86%). On price, update cadence, ads 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. Reedio sells 2 in-app purchases, starting at $2.99 per month. GAMMA AR asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Reedio holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: GAMMA AR has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of GAMMA AR's written reviews are positive against 100% of Reedio's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

Scorecard5 real differences · 5 level
GAMMA AR versus Reedio: the parameters behind the verdict, then further details
ParameterGAMMA ARReedio
PriceFreeFree
Rating4.6 (8 ratings)5.0 (1 ratings) — better
Positive reviews85.7% of reviews100.0% of reviews — better
Number of ratings8 — better1
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS16.0 — better17.0
Further details — not scored
Size384 MB12 MB
Age rating4+4+
DeveloperGAMMA TechnologiesEugene Ohu

Customer experience

GAMMA AR

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

Reedio

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

GAMMA AR

No in-app purchases

2 purchases

Reedio

Subscriptions2
  • Reedio Premium7 Days trial$2.991 Month
  • Reedio Premium7 Days trial$29.991 Year

Questions

Is GAMMA AR free?
GAMMA AR is free to download, with no in-app purchases.
Is Reedio free?
Reedio is free to download, with in-app purchases available.
Which has better reviews, GAMMA AR or Reedio?
Reedio is rated higher. GAMMA AR averages 4.6 out of 5 from 8 ratings, while Reedio averages 5.0 from 1 ratings.
Do GAMMA AR or Reedio have ads?
Neither GAMMA AR nor Reedio shows ads.
Which is updated more often, GAMMA AR or Reedio?
GAMMA AR ships an update every 2 weeks, and Reedio every 2 weeks. Most recently, GAMMA AR was updated on October 19, 2026 and Reedio on October 18, 2026.

Other comparisons