Comparison

Bullets* vs ACL

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

Head to head
About

Bullets*

Access medical and orthopedic educational content, including topics, questions, and cases. Create custom exams, review scientific articles, and monitor community activity. Earn CME credits through self-assessment exams and collaborative learning.

Highlights
  • Medical and orthopedic topics
  • Customizable exams (Testmaster)
  • Article review with PDFs
  • Community activity feed
  • Earn CME credits
  • Point of Care Learning (PoCL)
Features
Read full description

The companion APP for Orthobullets.com and Medbullets.com. Bullets* contains medbullets and orthobullets Topics, Questions, Techniques, Cases, Videos, and Evidence. Our Testmaster allows you to create, take, and review customized exams. Article links allows for quick review of scientific abstracts and often the PDF is provided and can be viewed on your phone. Our "Home" screen allows you to monitor a thread of educational activity within our community. All educational activity, including the Qbank, is synced with the main platform for seamless use on both your iPhone APP and computer. You can earn CME by taking Self-Assessment Exams and contributing to our free collaboration community by posting educational comments with scientific references as part of our Point of Care Learning (PoCL) activity. All CME Study Plan examinations can be taken on the iPhone and can be found on your CME Dashboard. Residents on the PASS institutional platform can take PASS exams, complete their PASS Skillmaster learning modules, and submit both Rotation and Milestone Skill Evaluations to faculty. Faculty members using PASS Pro 2.0 can grade Rotation Evaluations and Milestone Skill Evaluations on the APP, eliminating the need to log in with each evaluation.

About

ACL

Features
Read full description

ACL-X -- The Smartphone App for ACL Surgery! This App was developed for knee surgeons performing anterior cruciate ligament (ACL) reconstruction and using intraoperative fluoroscopy to increase precision of bone tunnel placement. By means of supporting lines that you can overlay virtually over the X-ray photograph in the app, the app can calculate the relative distance of the target point for the k-wire for a femoral or tibial surgery. In the medical literature, femoral measurement of a radiographic image is known as quadrant method by Bernard and Hertel. It may help knee surgeons identify the ideal position for bone tunnel placement during ACL reconstruction. During the operative procedure, place a guide wire (or the tip of an microfracure awl) into the center of the femoral insertion area using your standard operative set up. Alternatively, you may may advance the k-wire in the center of the projected bone tunnel forward penetrating the skin on the lateral side of the femur so the end of the wire is flush with the femoral cortex of the insertion. The app will display the relative ratio of your target point in reference to the outlines of the bone of the femoral condyles. The measurement values relate to the relative distance of the target point of the most posterior and proximal border of the condyles. Tibia measurement of a radiographic image has been described by Stäubli und Rauschning. It may help knee surgeons identify the ideal position of the tibial bone tunnel during ACL reconstruction. Place a guide pin into the center of the projected tibial bone tunnel using a drill guide in a normal fashion. The guide pin may intrude the joint beyond the cortical edge of the ACL footprint. This app will display the relative distance (in percent) of the entry point of the guide wire into the joint in relation to the total anterior posterior (AP) distance of the proximal tibia (100 %).

Screenshots

Bullets*4 screens
ACL4 screens

Verdict

The call

The clearest difference is in-app purchases: Bullets* at none against ACL's 3. Bullets* also leads on update cadence (every 8 days vs every 8 months). ACL's advantage is iOS requirement (10.2 vs 13.0). On price, 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. ACL sells 3 one-off in-app purchases. Bullets* asks for nothing beyond the download.

UpkeepUpdate frequency

Bullets* ships an update every 8 days, ACL every 8 months. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Bullets* versus ACL: the parameters behind the verdict, then further details
ParameterBullets*ACL
PriceFreeFree
Rating4.0 (61 ratings) — better—
Positive reviews67.6% of reviews—
Number of ratings61 — better—
Update frequencyEvery 8 days — betterEvery 8 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.010.2 — better
Further details — not scored
Size168 MB38 MB
Age rating17+17+
DeveloperLineageMedical IncLinova Software GmbH

In-app purchases

None

Bullets*

No in-app purchases

3 purchases

ACL

One-time3
  • 1 Credit$0.99
  • 10 Credits$8.99
  • 50 Credits$24.99

Questions

Is Bullets* free?
Bullets* is free to download, with no in-app purchases.
Is ACL free?
ACL is free to download, with in-app purchases available.
Do Bullets* or ACL have ads?
Neither Bullets* nor ACL shows ads.
Which is updated more often, Bullets* or ACL?
Bullets* ships an update every 8 days, and ACL every 8 months. Most recently, Bullets* was updated on October 11, 2026 and ACL on September 30, 2026.

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