iMass vs Sub Tuum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iMass
Access the Traditional Catholic Latin Mass live or on-demand from anywhere in the world. Find nearby Mass locations with times and directions, and follow along with an integrated missal. Includes the Divine Office and official blessings.
- Live streaming of Latin Mass
- On-demand Mass viewing
- Latin Mass location finder
- Integrated missal
- Breviary (Divine Office)
- Rituale (1962 blessings)
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iMass removes boundaries for the spread of the Traditional Catholic Mass. It brings the Latin Mass to the ends of the earth. iMass provides access to the Mass - anywhere, anytime. Are you unable to attend Mass, either because of health, distance or unavailability of a Latin Mass? iMass streams the Mass live from different locations around the world, or you can view the Mass of the day or the Mass of last Sunday on demand, anywhere, anytime. The broadcast Masses are celebrated in the Extraordinary Form by the Priestly Fraternity of St. Peter. Are you traveling and would like to find your closest Latin Mass? The iMass Map is continuously updated by users of the app and will eventually show every Latin Mass location approved by the Catholic Church. Complete with Mass times and driving directions. Suppose you don’t want to carry around your missal or you have forgotten it - no problem, with iMass you can follow the Mass with our easy to follow missal. The app also includes the Breviary (Divine Office) and the Rituale - the book of official blessings for priests of 1962. Just to be clear: you cannot fulfill you Sunday obligation by viewing the Mass on iMass. However, in a similar way to other televised Masses, it is a way to unite yourself to the Mass when you are unable to attend. When sickness or another valid reason excuses you of your obligation to attend the Mass, this is the best way you can unite yourself to the Mass that you are unable to attend. iMass. Mass, Anywhere, Anytime.
Sub Tuum
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For Catholics engaged in real spiritual warfare. Sub Tuum is a daily companion built on the traditional Catholic framework for prayer, deliverance, and the interior life — the same framework the saints relied on and the Church has kept for centuries. It assumes you know what a scapular is, why the Rosary matters, and that the devil is real. BEGIN WITH DISCERNMENT A traditional spiritual assessment helps you see clearly what you are facing — ordinary temptation, oppression, obsession, infestation, or something that requires a priest immediately. No guesswork, no sensationalism. Just the Church's long framework, honestly applied. Your personalized battle plan is calibrated from your answers. A DAILY RULE OF PRAYER Your prayers appear each morning, organized by time of day. Morning offerings. Prayer to St. Michael. The Angelus at noon. The Rosary in the evening. Deliverance prayers where appropriate. Tap any prayer to read its full text in English and traditional Latin side by side. Mark it offered. Build the day, prayer by prayer. THE ROSARY IN FULL Pray the complete Rosary with all four mystery sets — including the traditional 15-decade Dominican Rosary. Every bead shows the full prayer text. Every mystery includes its meditation and spiritual fruit. Visual mode with progress ring, or minimal mode for distraction-free prayer. The Chaplet of Divine Mercy is included complete. EXAMINATION OF CONSCIENCE, PROTECTED Examine your conscience by the Ten Commandments or the Seven Capital Sins. Your journal is locked behind Face ID, Touch ID, or your passcode. Your sins are between you and God — and a priest in the confessional. Not us. Not Apple. Not anyone. HONEST PROGRESS TRACKING Weekly and monthly trend charts. Calendar heatmaps showing the shape of your spiritual life. Per-sin frequency so you can see which struggles are easing and which are not. View progress since your last confession, or across your lifetime. Quiet, truthful, never gamified. SACRAMENTAL ANCHORS Log your confessions. Watch the days pass. Be reminded gently when it has been too long. Keep Sunday Mass on your mind without being scolded. PRIVACY IS NON-NEGOTIABLE Your data stays on your device and your own private iCloud. No servers. No accounts. No analytics. No ads. No third-party SDKs. We literally cannot see your prayers, your examinations, or your confessions, because the data never leaves your control. Verified in the App Privacy section above: data collected = none. APPLE WATCH COMPANION Glance at your wrist to see today's rule. Tap a prayer to mark it offered. A watch face complication shows your day's progress. Haptic confirmation when prayers complete. The Rosary can be prayed entirely from the watch. FOR WHOM Catholics serious about prayer. Those drawn to the Traditional Latin Mass. Those working through spiritual struggles under the guidance of a priest. Anyone who wants a companion for the interior life rather than a habit-tracking gimmick. WHAT THIS APP IS NOT Sub Tuum is not a substitute for a priest, the sacraments, or a trained exorcist. Where your situation calls for one, the app will say so plainly and direct you to seek proper help. Exorcism belongs to ordained priests with episcopal authorization, not to applications. ON REFERENCES The framework draws from traditional Catholic teaching on spiritual warfare, particularly as articulated by Fr. Chad Ripperger. Where his book Deliverance Prayers: For Use by the Laity (Sensus Traditionis Press) would complete a user's daily rule, the app refers you to the book rather than reproducing its contents. "Sub tuum praesidium confugimus, sancta Dei Genetrix." We fly to thy patronage, O holy Mother of God. From Patriot Plunges LLC · Oxford, Mississippi Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.patriotplunges.com/subtuum
Screenshots
Verdict
The clearest difference is update cadence: Sub Tuum at weekly against iMass's every 3 months. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iMass ships an update every 3 months, Sub Tuum weekly. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.
| Parameter | iMass | Sub Tuum |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (81 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 81 — better | — |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.6 |
| Further details — not scored | ||
| Size | 125 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | James Fryar | Patriot Plunges LLC |
Bugs and requests
iMass
Reported bugs
14 issues- Missing 'Ecce Agnus Dei' and 'Domine non sum dignus' prayers
- Psalm verse numbering incorrect
- App crashes after July 23 update on Android tablets
- Video pausing causes restart when clicking other links
- Language switching resets to beginning of mass
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- Rubrics setting doesn't persist between sessions
- Font size settings not functional on iPhone Pro models
- Internal links to confession prayers and spiritual communion non-functional
- Missing Sunday evening readings for Saturday masses
- App won't open or load properly for some users
- Text size options ineffective despite settings changes
- Missal removed in November update rendering app unusable
- Frame expansion required daily
- No back link to home screen
Requested features
20 requests- Offline download capability for missals and propers
- Filter option for mass propers only
- Skip to different breviary sections
- Display feast name and ranking for each day
- Store ordinary of the mass in app without downloading
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- Portrait mode orientation support
- Landscape mode in both directions
- Add sit, stand, kneel notations
- Include second Confiteor
- Archive of past masses for viewing
- Better audio quality and microphone setup
- Improved video zoom to see full altar
- Daily YouTube channel updates
- iPad optimization and support
- Rename app to reflect breviary inclusion
- Explanatory notes on missal version differences
- Include requiem masses and other occasions
- Baptism and exorcism rite texts
- Save rubrics preference settings
- Better text sizing options that actually work
Sub Tuum
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iMass
No in-app purchases
Sub Tuum
No in-app purchases









