Comparison

STI Tx Guide vs f

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

Head to head
About

STI Tx Guide

Provides healthcare professionals with up-to-date, evidence-based recommendations for the prevention, diagnosis, and treatment of sexually transmitted infections. Features include clinical care guidance, sexual history resources, and patient materials for effective patient management.

Highlights
  • STI prevention recommendations
  • Diagnosis guidance
  • Treatment protocols
  • Clinical care assistance
  • Sexual history resources
  • Patient management tools
Features
Read full description

The new app offers quick and easy access to streamlined STI prevention, diagnosis, and treatment recommendations. The user-friendly interface includes more clinical care guidance, sexual history resources, patient materials, and other features to assist with patient management. The STI Treatment (Tx) Guidelines mobile app serves as a quick reference guide for doctors and related parties on the identification of and treatment for sexually transmitted diseases (STDs). The full STI Treatment Guidelines (cdc.gov) can be accessed at https://www.cdc.gov/std/treatment-guidelines/default.htm. The guidelines provide current evidence-based prevention, diagnostic and treatment recommendations that replace the 2015 guidance. The recommendations are intended to be a source for clinical guidance. Healthcare providers should always assess patients based on their clinical circumstances and local burden. DISCLAIMER THE MATERIALS EMBODIED IN THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) OR THE UNITED STATES (U.S.) GOVERNMENT BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSE OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR NOT CDC OR THE U.S. GOVERNMENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.

About

f

Read full description

f-tree software has been mutually developed by the Iwate Tohoku Medical Megabank Organization, Iwate Medical University and Holonic Systems Ltd. http://iwate-megabank.org/en/genetic/ We first developed a desktop version that runs on windows and macos, and based on this we developed an iOS version. The ios version basically has the same functions as the desktop version. By installing this application, you are deemed to have agreed to the following terms. I agree to the following terms regarding the use of the family tree preparation software (f-tree) (hereafter referred to as “the Software”) that are released by the Iwate Tohoku Medical Megabank Organization, Iwate Medical University (hereafter referred to as “the Organization”). ・In principle,the Software shall be provided free of charge. ・It shall be verified that the computer used for operation complies with the usage conditions and validation required by the Software. ・The user shall bear complete responsibility for installing and using the Software. The Organization confirms that it will not bear liability for any or all the problems that the user might experience while installing or using the Software. The Organization also confirms that it will not bear liability for any dispute between the user and the third party (including but not limited to a dispute concerning copyright or other issue related to intellectual property right). ・If the Software is used to prepare a presentation for an academic organization, a published article, a book, or an entry in a company's pamphlet, the user shall provide the URL that is used to distribute the Software and an acknowledgement for its use. ・All the rights, such as copyright to the Software and copies of the Software, shall solely belong to the Organization. ・The Software shall not be used for any other purpose and shall not be distributed to a third party. ・The Software shall not be entirely or partly revised, modified, reverse engineered, compiled, or assembled. ・None of the part of the Software shall be copied, corrected, loaned, sold, distributed, or transferred. Additionally, copying without authorization is completely prohibited. ・The Software shall not be used for any commercial activity (rental, pseudo-rental, or sales to a third party). ・It must be confirmed that when the user is authorized to use the Software, this neither explicitly nor implicitly grants the user a guarantee of any kind. ・It shall be confirmed that the Software might be improved or modified without any prior notification. Please contact the following email address every time when researching,making a conference presentation, and presenting a paper with the software. f-tree@iwate-med.ac.jp Also, please quote the following literature when using the software for an academic paper. Tokutomi T, Fukushima A, Yamamoto K, Bansho Y, Hachiya T, Shimizu A. BMC Med Genet. 2017;18:71. https://bmcmedgenet.biomedcentral.com/articles/10.1186/s12881-017-0433-4

Screenshots

STI Tx Guide4 screens
f4 screens

Verdict

The call

The clearest difference is update cadence: STI Tx Guide at every 2 months against f's every 8 months. f's advantage is iOS requirement (12.0 vs 15.0). 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

STI Tx Guide ships an update every 2 months, f every 8 months. The most recent releases landed on October 17, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 8 level
STI Tx Guide versus f: the parameters behind the verdict, then further details
ParameterSTI Tx Guidef
PriceFreeFree
Rating3.5 (36 ratings) — better—
Positive reviews35.7% of reviews—
Number of ratings36 — better—
Update frequencyEvery 2 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.012.0 — better
Further details — not scored
Size36 MB10 MB
Age rating12+17+
DeveloperCenters For Disease Control and PreventionHolonic Systems,Y.K.

In-app purchases

None

STI Tx Guide

No in-app purchases

None

f

No in-app purchases

Questions

Is STI Tx Guide free?
STI Tx Guide is free to download, with no in-app purchases.
Is f free?
f is free to download, with no in-app purchases.
Do STI Tx Guide or f have ads?
Neither STI Tx Guide nor f shows ads.
Which is updated more often, STI Tx Guide or f?
STI Tx Guide ships an update every 2 months, and f every 8 months. Most recently, STI Tx Guide was updated on October 17, 2026 and f on October 3, 2026.

Other comparisons